转CSDN社区的清清月儿的GridView 72般绝技
快速预览： GridView无代码分页排序 GridView选中，编辑，取消，删除 GridView正反双向排序 GridView和下拉菜单DropDownList结合 GridView和CheckBox结合 鼠标移到GridView某一行时改变该行的背景色方法一 鼠标移到GridView某一行时改变该行的背景色方法二 GridView实现删除时弹出确认对话框 GridView实现自动编号 GridView实现自定义时间货币等字符串格式 GridView实现用“...”代替超长字符串 GridView一般换行与强制换行 GridView显示隐藏某一列 GridView弹出新页面/弹出新窗口 GridView固定表头(不用javascript只用CSS，2行代码，很好用) GridView合并表头多重表头无错完美版（以合并3列3行举例） GridView突出显示某一单元格（例如金额低于多少，分数不及格等） GridView加入自动求和求平均值小计 GridView数据导入Excel/Excel数据读入GridView
1.GridView无代码分页排序：
效果图： 
1.AllowSorting设为True，aspx代码中是AllowSorting="True"； 2.默认1页10条，如果要修改每页条数，修改PageSize即可，在aspx代码中是PageSize="12"。 3.默认的是单向排序的，右击GridView弹出“属性”，选择AllowSorting为True即可。
2.GridView选中，编辑，取消，删除：
效果图： 
后台代码： 你可以使用sqlhelper,本文没用。代码如下： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page {
//清清月儿http://blog.csdn.net/21aspnet SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=数据库名;Uid=帐号;Pwd=密码"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind(); } } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); }
//删除 protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { string sqlstr = "delete from 表 where id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcon = new SqlConnection(strCon); sqlcom = new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); bind(); }
//更新 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 表 set 字段1='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',字段2='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim() + "',字段3='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom=new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); }
//取消 protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); }
//绑定 public void bind() { string sqlstr = "select * from 表"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "表"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "id" };//主键 GridView1.DataBind(); sqlcon.Close(); } }
前台主要代码： ... ...
3.GridView正反双向排序： 效果图：点姓名各2次的排序，点其他也一样可以。 
后台代码： using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; public partial class Default3 : System.Web.UI.Page {
//清清月儿的博客http://blog.csdn.net/21aspnet SqlConnection sqlcon; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd="; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ViewState["SortOrder"] = "身份证号码"; ViewState["OrderDire"] = "ASC"; bind(); } } protected void GridView1_Sorting(object sender, GridViewSortEventArgs e) { string sPage = e.SortExpression; if (ViewState["SortOrder"].ToString() == sPage) { if (ViewState["OrderDire"].ToString() == "Desc") ViewState["OrderDire"] = "ASC"; else ViewState["OrderDire"] = "Desc"; } else { ViewState["SortOrder"] = e.SortExpression; } bind(); }
public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); DataView view = myds.Tables["飞狐工作室"].DefaultView; string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"]; view.Sort = sort; GridView1.DataSource = view; GridView1.DataBind(); sqlcon.Close(); } }
前台主要代码：
4.GridView和下拉菜单DropDownList结合：
效果图： 
后台代码： using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; public partial class Default4 : System.Web.UI.Page { SqlConnection sqlcon; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { DropDownList ddl; if (!IsPostBack) { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataBind(); for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { DataRowView mydrv = myds.Tables["飞狐工作室"].DefaultView[i]; if (Convert.ToString(mydrv["员工性别"]).Trim() == "True") { ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1"); ddl.SelectedIndex = 0; } if (Convert.ToString(mydrv["员工性别"]).Trim() == "False") { ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1"); ddl.SelectedIndex = 1; } } sqlcon.Close(); } } public SqlDataReader ddlbind() { string sqlstr = "select distinct 员工性别 from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlCommand sqlcom = new SqlCommand(sqlstr, sqlcon); sqlcon.Open(); return sqlcom.ExecuteReader(); }
前台主要代码：
5.GridView和CheckBox结合：
效果图： 
后台代码：
using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient;
public partial class Default5 : System.Web.UI.Page { //清清月儿http://blog.csdn.net/21aspnet SqlConnection sqlcon; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind(); } } protected void CheckBox2_CheckedChanged(object sender, EventArgs e) { for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1"); if (CheckBox2.Checked == true) { cbox.Checked = true; } else { cbox.Checked = false; } } } protected void Button2_Click(object sender, EventArgs e) { sqlcon = new SqlConnection(strCon); SqlCommand sqlcom; for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1"); if (cbox.Checked == true) {
string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[i].Value + "'"; sqlcom = new SqlCommand(sqlstr, sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); } } bind(); } protected void Button1_Click(object sender, EventArgs e) { CheckBox2.Checked = false; for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { CheckBox cbox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1"); cbox.Checked = false; } } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "tb_Member"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); } }
前台主要代码：
6.鼠标移到GridView某一行时改变该行的背景色方法一：
效果图： 
做法： 双击GridView的OnRowDataBound事件； 在后台的GridView1_RowDataBound()方法添加代码，最后代码如下所示： protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { int i; //执行循环，保证每条数据都可以更新 for (i = 0; i < GridView1.Rows.Count; i++) { //首先判断是否是数据行 if (e.Row.RowType == DataControlRowType.DataRow) { //当鼠标停留时更改背景色 e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'"); //当鼠标移开时还原背景色 e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c"); } }
}
前台代码：
7.鼠标移到GridView某一行时改变该行的背景色方法二：
效果图： 
做法：和上面的一样就是代码不同 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { //int i; ////执行循环，保证每条数据都可以更新 //for (i = 0; i < GridView1.Rows.Count; i++) //{ // //首先判断是否是数据行 // if (e.Row.RowType == DataControlRowType.DataRow) // { // //当鼠标停留时更改背景色 // e.Row.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#00A9FF'"); // //当鼠标移开时还原背景色 // e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c"); // } //} //如果是绑定数据行 if (e.Row.RowType == DataControlRowType.DataRow) { //鼠标经过时，行背景色变 e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'"); //鼠标移出时，行背景色变 e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'"); }
}
8.GridView实现删除时弹出确认对话框：
效果图： 
实现方法： 双击GridView的OnRowDataBound事件； 在后台的GridView1_RowDataBound()方法添加代码，最后代码如下所示：
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { //如果是绑定数据行 if (e.Row.RowType == DataControlRowType.DataRow) { if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate) { ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')"); } }
}
9.GridView实现自动编号：
效果图： 
实现方法： 双击GridView的OnRowDataBound事件； 在后台的GridView1_RowDataBound()方法添加代码，最后代码如下所示： protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { //如果是绑定数据行 //清清月儿http://blog.csdn.net/21aspnet if (e.Row.RowType == DataControlRowType.DataRow) { ////鼠标经过时，行背景色变 //e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'"); ////鼠标移出时，行背景色变 //e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");
////当有编辑列时，避免出错，要加的RowState判断 //if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate) //{ // ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')"); //}
} if (e.Row.RowIndex != -1) { int id = e.Row.RowIndex + 1; e.Row.Cells[0].Text = id.ToString(); }
}
注意这时最好把前台的第一列的表头该为“编号”，因为以前的第一列被“吃掉”了。
10.GridView实现自定义时间货币等字符串格式：
效果图： 图1-未格式化前 
图2-格式化后 
解决方法： 在asp.net 2.0中，如果要在绑定列中显示比如日期格式等，如果用下面的方法是显示不了的
主要是由于htmlencode属性默认设置为true,已防止XSS攻击，安全起见而用的，所以，可以有以下两种方法解决
1、
将htmlencode设置为false即可
另外的解决方法为，使用模版列
前台代码：
附录-常用格式化公式： {0:C} 货币； {0:D4}由0填充的4个字符宽的字段中显示整数； {0:000.0}四舍五入小数点保留第几位有效数字； {0:N2}小数点保留2位有效数字；{0:N2}% 小数点保留2位有效数字加百分号； {0:D}长日期；{0:d}短日期；{0:yy-MM-dd} 例如07-3-25；；{0:yyyy-MM-dd} 例如2007-3-25
11.GridView实现用“...”代替超长字符串：
效果图： 
解决方法：数据绑定后过滤每一行即可 for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { DataRowView mydrv; string gIntro; if (GridView1.PageIndex == 0) { mydrv = myds.Tables["飞狐工作室"].DefaultView[i];//表名 gIntro = Convert.ToString(mydrv["家庭住址"]);//所要处理的字段 GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2); } else { mydrv = myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)]; gIntro = Convert.ToString(mydrv["家庭住址"]); GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2); } }
调用的方法：
public string SubStr(string sString, int nLeng) { if (sString.Length <= nLeng) { return sString; } string sNewStr = sString.Substring(0, nLeng); sNewStr = sNewStr + "..."; return sNewStr; }
后台全部代码： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ViewState["SortOrder"] = "身份证号码"; ViewState["OrderDire"] = "ASC"; bind(); } } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); } protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcon = new SqlConnection(strCon); sqlcom = new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); bind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom=new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { DataRowView mydrv; string gIntro; if (GridView1.PageIndex == 0) { mydrv = myds.Tables["飞狐工作室"].DefaultView[i]; gIntro = Convert.ToString(mydrv["家庭住址"]); GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2); } else { mydrv = myds.Tables["飞狐工作室"].DefaultView[i + (5 * GridView1.PageIndex)]; gIntro = Convert.ToString(mydrv["家庭住址"]); GridView1.Rows[i].Cells[3].Text = SubStr(gIntro, 2); } } sqlcon.Close(); } public string SubStr(string sString, int nLeng) { if (sString.Length <= nLeng) { return sString; } string sNewStr = sString.Substring(0, nLeng); sNewStr = sNewStr + "..."; return sNewStr; } protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { //如果是绑定数据行 if (e.Row.RowType == DataControlRowType.DataRow) { ////鼠标经过时，行背景色变 //e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#E6F5FA'"); ////鼠标移出时，行背景色变 //e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");
////当有编辑列时，避免出错，要加的RowState判断 //if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate) //{ // ((LinkButton)e.Row.Cells[6].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除：\"" + e.Row.Cells[1].Text + "\"吗?')"); //}
} if (e.Row.RowIndex != -1) { int id = e.Row.RowIndex + 1; e.Row.Cells[0].Text = id.ToString(); }
} }
11.GridView一般换行与强制换行：
效果图： 
首先设置
如果要给所有的列增加此属性： protected void Page_Load(object sender, EventArgs e) { //正常换行 GridView1.Attributes.Add("style", "word-break:keep-all;word-wrap:normal"); //下面这行是自动换行 GridView1.Attributes.Add("style", "word-break:break-all;word-wrap:break-word"); if (!IsPostBack) { bind();//调用数据绑定即可 } } 总之：善用CSS的word-break:break-all;word-wrap:break-word属性即可，这个属性是通用的对于顽固的南换行问题都可以解决，不局限于GridView。
12.GridView显示隐藏某一列： 本方案为月儿独创，不同于网上其他方式，我觉得用一个CheckBox更人性化，这样可以隐藏不必要的列，让用户自己选择需要出现的列，在处理多列时这是一个很好的解决方案！
效果图： 图1-开始 
图2-点击显示的CheckBox后 
解决方案： public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); GridView1.Columns[3].Visible = false;//一开始隐藏 CheckBox1.Checked = false;//如果不这样后面的代码会把他True }
双击CheckBox1，在CheckedChanged方法里写上代码，最后代码如下： protected void CheckBox1_CheckedChanged(object sender, EventArgs e) { GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible; Response.Write("GridView1的第4列现在的显示隐藏状态是："+GridView1.Columns[3].Visible.ToString()); }
注意：CheckBox1的AutoPostBack要True！
后台全部代码如下：
using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ViewState["SortOrder"] = "身份证号码"; ViewState["OrderDire"] = "ASC"; bind(); } } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); } protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { string sqlstr = "delete from 飞狐工作室 where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcon = new SqlConnection(strCon); sqlcom = new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); bind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom=new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); GridView1.Columns[3].Visible = false; CheckBox1.Checked = false; } protected void CheckBox1_CheckedChanged(object sender, EventArgs e) { GridView1.Columns[3].Visible=! GridView1.Columns[3].Visible; Response.Write("GridView1的第4列现在的显示隐藏状态是："+GridView1.Columns[3].Visible.ToString()); } }
前台代码：
13.GridView弹出新页面/弹出制定大小位置新窗口：
效果图： 
方案一：简单的方法，新窗口不固定大小
方案二：精确控制弹出窗口大小位置
使用的是结合javascript的window.open方法，关于window.open的参数网上有很多帖子，本站也有许多参考 弹出窗口大全 http://blog.csdn.net/21aspnet/archive/2004/10/25/150231.aspx 即可！
14.GridView固定表头(不用javascript只用CSS!，很好用)：
效果图： 
代码：
用法：CSS设如上的样式，HeaderStyle加CssClass="Freezing，套住GridView的Div设置高度宽度
15.GridView合并表头多重表头无错完美版（以合并3列3行举例）
效果图： 
后台代码： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Drawing; public partial class _Default : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind(); } } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom=new SqlCommand(sqlstr,sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); } public void bind() { string sqlstr = "select top 10 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); }
//这里就是解决方案 protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e) { switch (e.Row.RowType) { case DataControlRowType.Header: //第一行表头 TableCellCollection tcHeader = e.Row.Cells; tcHeader.Clear(); tcHeader.Add(new TableHeaderCell()); tcHeader[0].Attributes.Add("rowspan", "3"); //跨Row tcHeader[0].Attributes.Add("bgcolor", "white"); tcHeader[0].Text = ""; tcHeader.Add(new TableHeaderCell()); //tcHeader[1].Attributes.Add("bgcolor", "Red"); tcHeader[1].Attributes.Add("colspan", "6"); //跨Column tcHeader[1].Text = "全部信息
//第二行表头 tcHeader.Add(new TableHeaderCell()); tcHeader[2].Attributes.Add("bgcolor", "DarkSeaGreen"); tcHeader[2].Text = "身份证号码"; tcHeader.Add(new TableHeaderCell()); tcHeader[3].Attributes.Add("bgcolor", "LightSteelBlue"); tcHeader[3].Attributes.Add("colspan", "2"); tcHeader[3].Text = "基本信息"; tcHeader.Add(new TableHeaderCell()); tcHeader[4].Attributes.Add("bgcolor", "DarkSeaGreen"); tcHeader[4].Text = "福利"; tcHeader.Add(new TableHeaderCell()); tcHeader[5].Attributes.Add("bgcolor", "LightSteelBlue"); tcHeader[5].Attributes.Add("colspan", "2"); tcHeader[5].Text = "联系方式
//第三行表头 tcHeader.Add(new TableHeaderCell()); tcHeader[6].Attributes.Add("bgcolor", "Khaki"); tcHeader[6].Text = "身份证号码"; tcHeader.Add(new TableHeaderCell()); tcHeader[7].Attributes.Add("bgcolor", "Khaki"); tcHeader[7].Text = "姓名"; tcHeader.Add(new TableHeaderCell()); tcHeader[8].Attributes.Add("bgcolor", "Khaki"); tcHeader[8].Text = "出生日期"; tcHeader.Add(new TableHeaderCell()); tcHeader[9].Attributes.Add("bgcolor", "Khaki"); tcHeader[9].Text = "薪水"; tcHeader.Add(new TableHeaderCell()); tcHeader[10].Attributes.Add("bgcolor", "Khaki"); tcHeader[10].Text = "家庭住址"; tcHeader.Add(new TableHeaderCell()); tcHeader[11].Attributes.Add("bgcolor", "Khaki"); tcHeader[11].Text = "邮政编码"; break; } } }
前台：
16.GridView突出显示某一单元格（例如金额低于多少，分数不及格等）
效果图： 
解决方案：主要是绑定后过滤 GridView1.DataBind(); for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { DataRowView mydrv = myds.Tables["飞狐工作室"].DefaultView[i]; string score = Convert.ToString(mydrv["起薪"]); if (Convert.ToDouble(score) < 34297.00)//大家这里根据具体情况设置可能ToInt32等等 { GridView1.Rows[i].Cells[4].BackColor = System.Drawing.Color.Red; } } sqlcon.Close();
全部后台代码：
using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Drawing;
public partial class Default7 : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind();
} } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom = new SqlCommand(sqlstr, sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); } public void bind() { string sqlstr = "select top 10 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); for (int i = 0; i <= GridView1.Rows.Count - 1; i++) { DataRowView mydrv = myds.Tables["飞狐工作室"].DefaultView[i]; string score = Convert.ToString(mydrv["起薪"]); if (Convert.ToDouble(score) < 34297.00)//大家这里根据具体情况设置可能ToInt32等等
{ GridView1.Rows[i].Cells[4].BackColor = System.Drawing.Color.Red; } } sqlcon.Close(); } }
前台代码：
17.GridView加入自动求和求平均值小计
效果图：
解决方案： private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是int protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowIndex >= 0) { sum += Convert.ToDouble(e.Row.Cells[6].Text); } else if (e.Row.RowType == DataControlRowType.Footer) { e.Row.Cells[5].Text = "总薪水为："; e.Row.Cells[6].Text = sum.ToString(); e.Row.Cells[3].Text = "平均薪水为："; e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString(); } }
后台全部代码： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Drawing;
public partial class Default7 : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind();
} } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; bind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { sqlcon = new SqlConnection(strCon); string sqlstr = "update 飞狐工作室 set 姓名='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='" + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'"; sqlcom = new SqlCommand(sqlstr, sqlcon); sqlcon.Open(); sqlcom.ExecuteNonQuery(); sqlcon.Close(); GridView1.EditIndex = -1; bind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; bind(); } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); } private double sum = 0;//取指定列的数据和 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowIndex >= 0) { sum += Convert.ToDouble(e.Row.Cells[6].Text); } else if (e.Row.RowType == DataControlRowType.Footer) { e.Row.Cells[5].Text = "总薪水为："; e.Row.Cells[6].Text = sum.ToString(); e.Row.Cells[3].Text = "平均薪水为："; e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString(); } } } 前台：唯一的花头就是设置ShowFooter="True" ，否则默认表头为隐藏的！
18.GridView数据导入Excel/Excel数据读入GridView
效果图： 
解决方案： 页面增加一个按钮，单击事件添加如下方法： protected void Button1_Click(object sender, EventArgs e) { Export("application/ms-excel", "学生成绩报表.xls"); }
private void Export(string FileType, string FileName) { Response.Charset = "GB2312"; Response.ContentEncoding = System.Text.Encoding.UTF7; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString()); Response.ContentType = FileType; this.EnableViewState = false; StringWriter tw = new StringWriter(); HtmlTextWriter hw = new HtmlTextWriter(tw); GridView1.RenderControl(hw); Response.Write(tw.ToString()); Response.End(); } //如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内 public override void VerifyRenderingInServerForm(Control control) { } 还有由于是文件操作所以要引入名称空间IO和Text
后台代码： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Drawing; using System.IO; using System.Text; public partial class Default7 : System.Web.UI.Page { SqlConnection sqlcon; SqlCommand sqlcom; string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind();
} } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; sqlcon = new SqlConnection(strCon); SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon); DataSet myds = new DataSet(); sqlcon.Open(); myda.Fill(myds, "飞狐工作室"); GridView1.DataSource = myds; GridView1.DataKeyNames = new string[] { "身份证号码" }; GridView1.DataBind(); sqlcon.Close(); }
protected void Button1_Click(object sender, EventArgs e) { Export("application/ms-excel", "学生成绩报表.xls"); }
private void Export(string FileType, string FileName) { Response.Charset = "GB2312"; Response.ContentEncoding = System.Text.Encoding.UTF7; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString()); Response.ContentType = FileType; this.EnableViewState = false; StringWriter tw = new StringWriter(); HtmlTextWriter hw = new HtmlTextWriter(tw); GridView1.RenderControl(hw); Response.Write(tw.ToString()); Response.End(); } public override void VerifyRenderingInServerForm(Control control) { } }
前台：
读取Excel数据的代码：这个很简单的 private DataSet CreateDataSource() { string strCon; strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("excel.xls") + "; Extended Properties=Excel 8.0;"; OleDbConnection olecon = new OleDbConnection(strCon); OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strCon); DataSet myds = new DataSet(); myda.Fill(myds); return myds; } protected void Button1_Click(object sender, EventArgs e) { GridView1.DataSource = CreateDataSource(); GridView1.DataBind(); }
转载于:https://www.cnblogs.com/tutuyforever/archive/2013/03/29/2989251.html