asp.net中gridview的绑定数据源实现增删改查
gridview还是比较灵活的，有一种类似于excel的用法，可以直接在表格中进行添加，修改等操作。单元格数据比较段的表格用起来很方便。
可以参考https://blog.csdn.net/yingzhaom/article/details/50614599
我在这基础上改成了点击按钮弹出模态框进行操作。如有此类需求可以参考我的代码。
先从绑定数据源开始。
页面加载时绑定数据(可以把数据库连接封装，后面会多次使用)：
//数据库连接
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)
{
//初始化table
bind_gv();
}
}
protected void bind_gv()
{
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");
gvTag.DataSource = myds;
gvTag.DataKeyNames = new string[] { "tid" };
gvTag.DataBind();
sqlcon.Close();
}前端代码（表中列的dataField与查询的列名对应）：
页数：
分页后台代码：
protected void gvTag_PageIndexChanging(object sender, System.Web.UI.WebControls.GridViewPageEventArgs e)
{
gvTag.PageIndex = e.NewPageIndex;
bind_gv();
}
protected void gvTag_DataBound(object sender, EventArgs e)
{
// 取得显示页数的那一列。
GridViewRow pagerRow = gvTag.BottomPagerRow;
if (pagerRow != null)
{
// 取得显示目前所在页数的 Label 控件。
Label pageLabel = (Label)(pagerRow.Cells[0].FindControl("lblCurrentPage"));
// 取得 第一页、上一页、下一页、最后页 的按钮。
ImageButton imgBtnFirst =
(ImageButton)(pagerRow.Cells[0].FindControl("imgBtnFirst"));
ImageButton imgBtnPrev =
(ImageButton)(pagerRow.Cells[0].FindControl("imgBtnPrev"));
ImageButton imgBtnNext =
(ImageButton)(pagerRow.Cells[0].FindControl("imgBtnNext"));
ImageButton imgBtnLast =
(ImageButton)(pagerRow.Cells[0].FindControl("imgBtnLast"));
// 设定何时应该显示 第一页、上一页、下一页、最后页 的按钮。
if (gvTag.PageIndex == 0)
{
imgBtnFirst.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
imgBtnPrev.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
}
else if (gvTag.PageIndex == gvTag.PageCount - 1)
{
imgBtnLast.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
imgBtnNext.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
}
else if (gvTag.PageCount <= 0)
{
imgBtnFirst.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
imgBtnPrev.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
imgBtnNext.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
imgBtnLast.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
}
if (pageLabel != null)
{
// 计算目前所在的页数。
int currentPage = gvTag.PageIndex + 1;
pageLabel.Text = currentPage.ToString() +
" / " + gvTag.PageCount.ToString();
}
}
}前台弹框代码：
后台弹框和编辑代码（里面的dao和impl是封装的数据库连接和更新的代码，TagInfo是封装的实体类）：
//编辑弹框弹出
protected void Modify_Click(object sender, EventArgs e)
{
LinkButton link = sender as LinkButton;
int index = Convert.ToInt32(link.CommandArgument);
TagInfoDao tag = new TagInfoDaoImpl();
TagInfo tagInfo = tag.findByTid(index);
//赋值
TidEdit.Text = index.ToString();
TagEdit.Text = tagInfo.groupCode +","+ tagInfo.elementCode;
TagNameEdit.Text = tagInfo.tagName;
NotesEdit.Text = tagInfo.notes;
//弹出模态框
ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
scriptManager.RegisterStartupScript(typeof(string), "", "$('#editModal').modal('show');", true);
//查询
VRInfoDao vr = new VRInfoDaoImpl();
List vrList = vr.findVRInfo("");
ddlVREdit.DataSource = vrList;
ddlVREdit.DataTextField = "code";
ddlVREdit.DataValueField = "VID";
ddlVREdit.DataBind();
ddlVREdit.SelectedIndex = tagInfo.vid - 1;
}
//编辑保存
protected void SaveEdit_Click(object sender, EventArgs e)
{
TagInfo tag = new TagInfo();
tag.tid = Convert.ToInt32(TidEdit.Text);
tag.groupCode = TagEdit.Text.Split(',')[0];
tag.elementCode = TagEdit.Text.Split(',')[1];
tag.tagName = TagNameEdit.Text;
tag.notes = NotesEdit.Text;
tag.vid = Convert.ToInt32(ddlVREdit.SelectedValue);
TagInfoDao tagDao = new TagInfoDaoImpl();
if (tagDao.updata(tag))
{
Alert("修改成功！");
}
else
{
Alert("修改失败！");
}
bind_gv();
} Alert弹框代码：
public void Alert(string str_Message)
{
ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
scriptManager.RegisterStartupScript(typeof(string), "", "alert('" + str_Message + "');", true);
}删除后台代码：
//删除
protected void Delete_Click(object sender, EventArgs e)
{
LinkButton link = sender as LinkButton;
int index = Convert.ToInt32(link.CommandArgument);
TagInfoDao tag = new TagInfoDaoImpl();
if (tag.delete(index))
{
//删除成功
Alert("删除成功");
}
else
{
//删除失败
Alert("删除失败");
}
bind_gv();
}新增跟编辑一样就不放代码了。