Gridview常用技巧

Code
1.gridview行绑定删除事件 
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='#dee9f9'"); 
                //当鼠标移开时还原背景色 
                e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c"); 
            } 
        } 
­
        if (e.Row.RowType == DataControlRowType.DataRow) 
        { 
     
            if (e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate) 
            { 
                ((LinkButton)e.Row.Cells[8].Controls[0]).Attributes.Add("onclick", "javascript:return confirm('你确认要删除： \"" + e.Row.Cells[5].Text + "\" 的 \""+ e.Row.Cells[1].Text +"\" 的等级考试报名吗?')"); 
            } 
        } 
   
    } 
­
     
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) 
    { 
        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["strcon"]); 
        con.Open(); 
        string id = GridView1.DataKeys[e.RowIndex].Value.ToString(); 
        SqlCommand scd = new SqlCommand("delete  from ts_xs_fourSixGradeTextSignUp where id='" + id + "'", con); 
        scd.ExecuteNonQuery(); 
        con.Close(); 
        this.bind(); 
} 
­
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
    { 
        string id = GridView1.DataKeys[e.NewEditIndex].Value.ToString(); 
        Response.Write("<script>window.open('std_addGradeTestSignUpInfoList.aspx?id=" + id + "','','width=740,height=410')</script>"); 
        Response.Write("<script>location='javascript:history.go(-1)'</script>"); 
    } 
2.JavaScript弹出对话框 
Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script language=javascript>alert('回复留言失败！');</script>"); 
   Response.Write("<script>alert('登陆成功！');history.go(-1);</script>"); 
         
3.GridView和CheckBox结合： 
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;}   
} 
} 
4.留言板： 
Gridview自定义模板 
<%@ Import Namespace="System.Data" %> 
<div id="div2" runat=server>         
<asp:ScriptManager ID="ScriptManager1" runat="server" > </asp:ScriptManager> 
<asp:UpdatePanel ID="UpdatePanel1" runat="server"UpdateMode="Conditional"> 
<ContentTemplate> 
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="200px" OnPageIndexChanging="GridView1_PageIndexChanging" AllowPaging=true PageSize="6" GridLines=None> 
<Columns> 
<asp:TemplateField>                   
   <ItemTemplate> 
     <table border="0" cellpadding="0" height=150 width=800> 
       <tr><td rowspan="3" style="width:120px" > 
<asp:Image ID="Image2" runat="server" ImageUrl='<%#((DataRowView)Container.DataItem)["PicUrl"]%>'/><br/> 
<div id="div12" style="text-align:left">         
昵称：<%# ((DataRowView)Container.DataItem)["UserName"]%> 
­
E-mail：<%# ((DataRowView)Container.DataItem)["userEmail"]%>   
来自：<%# ((DataRowView)Container.DataItem)["UserIP"].ToString().Substring(0, ((DataRowView)Container.DataItem)["UserIP"].ToString().LastIndexOf(".")+1)%> 
</div></td>   
<td colspan="2" style="height: 20px; text-align:left;"> 
  <asp:Image ID="Image3" runat="server" ImageUrl='<%# ((DataRowView)Container.DataItem)["faceurl"]%>'/> 
发表于：<%# ((DataRowView)Container.DataItem)["Addtime"]%> 
      </td></tr> 
  <tr><td colspan="2" valign="top" height="50" style="text-align:left;"> 
   <%# ((DataRowView)Container.DataItem)["UserContent"] %> 
­
<div id="main1"  style="margin-top:40px;border:#ff9966 1px solid;" visible='<%#(((DataRowView)Container.DataItem)["adminReply"]).ToString()==""?false:true %>' runat=server > <font color=red> 管理员回复：<br/><%# ((DataRowView)Container.DataItem)["adminReply"]%></font>   </div> 
  </td></tr></table> 
  </ItemTemplate> 
</asp:TemplateField> 
</Columns></asp:GridView> 
</ContentTemplate>           
<Triggers> 
<asp:AsyncPostBackTrigger ControlID="GridView1" EventName="PageIndexChanging"/> 
            </Triggers> 
  </asp:UpdatePanel>             
       </div> 
5.从一个另外一个页面获取获取gridveiw中数据 
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" PageSize="8" AutoGenerateColumns="False" EmptyDataText="暂时没有留言" OnPageIndexChanging="GridView1_PageIndexChanging" CellPadding="4" ForeColor="#333333" GridLines="None" Width="700px" OnRowDeleting="GridView1_RowDeleting" OnRowDataBound="GridView1_RowDataBound"> 
<Columns> 
<asp:HyperLinkField DataNavigateUrlFields="id"//绑定到超链接的属性字段DataNavigateUrlFormatString="UserInfo.aspx?id={0}" 
//对绑定的超链接NavigateUrl属性值的格式设置以便在UserInfo.aspx页面用Request.QueryString["id"]获取gridview的指定列主键id   
{public void init() 
{ //用Request.QueryString["id"].ToString()获取gridview的主键id   
string id = Request.QueryString["id"].ToString(); 
   if (id != null && id != "") 
   { 
string sql = "select * from message where id=" + id; 
    DataSet ds = db.GetData(sql, "message"); 
    this.username.Text = ds.Tables["message"].Rows[0]["username"].ToString(); 
//DataRowView rv = ds.Tables["0"].DefaultView[0]; 
//this.username.Text = rv["username"].ToString();     
} 
} 
DataTextField="username" HeaderText="用户" Target="_self" /> 
<asp:BoundField DataField="useremail" HeaderText="邮件" /> 
<asp:BoundField DataField="userurl" HeaderText="个人网站" /> 
<asp:CommandField ShowDeleteButton="True" />  </Columns> 
</asp:GridView>   
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<asp:TemplateField> 
       <ItemTemplate> 
           <asp:LinkButton ID="lbtnViewStudents" runat="server"  CommandArgument='<%#Eval("pc_id")%>'>查看选课学生</asp:LinkButton> 
       </ItemTemplate> 
</asp:TemplateField> 
#region 查看选课学生 
    protected void gv_TeachCoures_RowCommand(object sender, GridViewCommandEventArgs e) 
    { 
        Response.Redirect("ViewStudentChoose.aspx?pc_id=" + e.CommandArgument.ToString()); 
    } 
   #endregion 
<asp:TemplateField> 
<HeaderTemplate > 
教师编号 
</HeaderTemplate> 
<ItemTemplate > 
<a id="A1" href= "#" 
onclick='javascript:showDetail(<%#DataBinder.Eval(Container.DataItem, "id")%>);'><font style=" text-decoration: underline;"><asp:label id= "laid" runat= "server"  Text= '<%#Bind("jsgh")%>' Width="160px"> </asp:label> 
</font></a> 
</ItemTemplate> 
</asp:TemplateField> 
­
<asp:TemplateField HeaderText="编辑"> 
    <ItemTemplate> 
            <asp:Button ID='ButtonD' runat="server" CssClass="button"  CommandName="del"   CommandArgument=<%#bind("id")%> Text="删除" /> 
     </ItemTemplate> 
</asp:TemplateField> 
     /// 删除事件 
protected void gvTeacher_RowCommand(object sender, GridViewCommandEventArgs e) 
        { 
            if (e.CommandName == "del") 
            { 
                int id = Convert.ToInt32(e.CommandArgument.ToString()); 
                teacherBll.Delete(id); 
                this.pager.CurPage = this.ddlstPage.SelectedIndex + 1; 
                this.strWhere = this.hfdQeuryCondition.Value; 
                FillGridView(); 
            } 
­
        } 
­
  6.删除gridveiw选中行 
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) 
    { 
        string sql = "select * from message"; 
        OleDbDataAdapter da = new OleDbDataAdapter(sql,conn); 
        OleDbCommandBuilder oc = new OleDbCommandBuilder(da); 
        DataSet ds = new DataSet(); 
        da.Fill(ds,"b"); 
        DataRow row = ds.Tables["b"].Rows[e.RowIndex]; 
        row.Delete(); 
        da.Update(ds,"b"); 
        this.ShowInfo(); 
} 
7.//设置gridview中指定列的内容和鼠标移动是改变行颜色 
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++) 
//{ 
if (e.Row.RowType == DataControlRowType.DataRow) 
{   
e.Row.Attributes.Add("onmouseover","this.style.backgroundColor='#E6F5FA'"); 
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'"); 
if (e.Row.Cells[4].Text.Trim() == "0") 
{ 
   {e.Row.Cells [4].Text=" <font color=red>隐藏</font>";} 
else 
  {e.Row .Cells[4].Text="公开";} 
   }       ((LinkButton)(e.Row.Cells[6].Controls[0])).Attributes.Add("onclick","return confirm('确定要删除吗？')"); 
         
    } 
} 
8.GridView实现删除时弹出确认对话框： 
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?')"); 
     } 
   } 
} 
    /// GV 数据绑定事件 
protected void gvTeacher_RowDataBound(object sender, GridViewRowEventArgs e) 
   { 
        //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", " this.style.backgroundColor='#C0FAFF'"); 
   //当鼠标移开时还原背景色 
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=c"); 
//编辑按钮onclick事件 
string url = "TeacherAdd.aspx?id=" + this.gvTeacher.DataKeys[e.Row.RowIndex].Value; 
string OnClientClick = CommonPage.Fpage_f_win_opendialog_returnvalue(this.Page, url, 850, 600); 
­
­
//窗口事件 
public static string Fpage_f_win_opendialog_returnvalue(System.Web.UI.Page page, string URL, int width, int height) 
{ 
string js2 = "javascript:"; 
js2 += string.Format("res=window.showModalDialog(\"{0}\",window,\" 
status:no;resizable:no;dialogWidth:{1}px;dialogHeight:{2}px\");", URL, width.ToString(), height.ToString()); 
  js2 += "if (res==\"pleasefresh\")" + " {" + " refresh();" + "}"; 
  return js2; 
} 
例子： 
//新增按钮Onclick事件字符串 
string OnAddClientClick =Fpage_f_win_opendialog_returnvalue(this.Page, "TeacherAdd.aspx", 850, 600); 
  //绑定新增按钮btnAdd Onclick事件 
this.btnAdd.Attributes.Add("onclick", OnAddClientClick); 
              ((HtmlInputButton)e.Row.FindControl("ButtonE")).Attributes.Add("onclick", OnClientClick); 
//删除按钮onclick事件 
string ondeleteclick = "javascript:return confirm('是否删除教师" + e.Row.Cells[2].Text + "?')";              ((Button)e.Row.FindControl("ButtonD")).Attributes.Add("onclick",ondeleteclick; 
    } 
} 
         
9.GridView加入自动求和求平均值小计   
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(); 
             
        } 
} 
10.配置文件连接数据和取得web.config键值 
<connectionStrings> 
    <!-- SQL connection string for Inventory database lookup --> 
    <add name="SQLConnetionString" connectionString="server=(local);user id=sa;password=;database=OfficeAutoDB;min pool size=4;max pool size=4;packet size=3072" providerName="System.Data.SqlClient"> 
    </add> 
  </connectionStrings> 
­
  <appSettings> 
    <add key ="DSExcel" value="Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" ></add> 
    <add key="Excel" value ="App_Data\excel.xls"></add> 
  </appSettings> 
private readonly string DSExcel = ConfigurationSettings.AppSettings["DSExcel"].ToString(); 
    private readonly string Excel = ConfigurationSettings.AppSettings["Excel"].ToString(); 
    public static string sqlcon = ConfigurationManager.ConnectionStrings["SQLConnetionString"].ToString(); 
11.GridView数据导入Excel/Excel数据读入GridView 
由于是文件操作所以要引入名称空间IO和Text 
using System.IO; 
using System.Text; 
using System.Drawing; 
//导入Excel 
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) 
    { 
    } 
//读取Excel数据 
private DataSet CreateDataSource() 
    { 
        string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~\\App_Data\\excel.xls") + ";Extended Properties=Excel 8.0 ;"; 
        OleDbConnection olecon = new OleDbConnection(strCon); 
       // string ExcelDbPath = DSExcel + Server.MapPath(Excel) + ";"; 
       // OleDbConnection olecon = new OleDbConnection(ExcelDbPath); 
        OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", olecon); 
        DataSet myds = new DataSet(); 
        myda.Fill(myds); 
        return myds; 
­
    } 
    protected void Button1_Click(object sender, EventArgs e) 
    { 
        GridView1.DataSource = CreateDataSource(); 
        GridView1.DataBind(); 
­
} 
11.GridView动态分页取出当前显示需要显示的记录 
private DataSet GetCachingData(int nStartIndex, int nMaxIndex) 
    { 
        string sql = "select * from Files"; 
        SqlConnection cn = new SqlConnection(sqlcon); 
        string counttext = "select count(*) as countFiles from Files"; 
        SqlCommand cmd = new SqlCommand(counttext, cn); 
        SqlDataAdapter adapter = new SqlDataAdapter(sql, cn); 
        DataSet ds = new DataSet(); 
        cn.Open(); 
        int nMaxcount = Int32.Parse(cmd.ExecuteScalar().ToString()); 
        int nPagecount = nMaxcount / GridView1.PageSize; 
        if (GridView1.PageSize * nPagecount < nMaxcount) 
        { 
            nPagecount++; 
­
        } 
        adapter.Fill(ds, nStartIndex, nMaxIndex, "Files"); 
        cn.Close(); 
        return (ds); 
         
    } 
    private void BindData() 
    { 
        DataSet ds = new DataSet(); 
        if (GridView1.PageIndex == 0) 
        { 
            ds = GetCachingData(0, GridView1.PageSize); 
        } 
        else 
        { 
            if (GridView1.PageIndex > 1) 
            { 
                ds = GetCachingData((GridView1.PageIndex - 1) * GridView1.PageSize, GridView1.PageSize); 
            } 
        } 
        if (ds != null && ds.Tables.Count > 0) 
        { 
            GridView1.DataSource = ds; 
            GridView1.DataBind(); 
        } 
    } 
//选中checkbox 
private ArrayList GetSelected() 
  { ArrayList selected = new ArrayList(); 
for (int i = 0; i <= gvTeacher.Rows.Count - 1; i++) 
      { 
          if (((CheckBox)gvTeacher.Rows[i].FindControl("chkBox1")).Checked) 
               selected.Add(Convert.ToInt32(gvTeacher.DataKeys[i].Value)); 
       } 
     return selected; 
   }