在 Gridview ASP.NET 中删除选定的动态复选框

Question

我有一个包含数据库数据的网格视图。我为每一行动态创建了复选框。我想要的是当我单击“删除选定的”按钮时，选中的复选框将被删除。但是当我单击按钮时，这些行不会被删除。这是按钮的代码：

protected void btnDeleteSelectedServiceProvidersLocations_Click(object sender, EventArgs e)
    {
        int x = 102;
        string delete;
        foreach (GridViewRow grow in gvServiceProviders.Rows)
        {
            delete = Request.Form["gvServiceProviders$ct" + x + "$cbSelect"];
            if (delete != null || delete == "on" || delete == "y")
            {
                bll.ServiceProviderLocationID = grow.Cells[1].Text;
                bll.IsDeleted = "y";
                bll.ServiceProviderLocationDelete();
            }
            x++;
        }
        gvServiceProviders.DataSource = bll.GetServiceProviderLocations();
        gvServiceProviders.DataBind();
    }

gridview 位于更新面板内，如果有帮助的话。而且我使用的是三层方法。

ASPX 代码：

<div ID="gridView">
     <asp:GridView ID="gvServiceProviders" runat="server">
            <Columns>
                  <asp:templatefield HeaderText="Select">
                       <itemtemplate>
                                <asp:CheckBox ID="cbSelect" runat="server"/>
                       </itemtemplate>
                  </asp:templatefield>
            </Columns>
     </asp:GridView>
 </div>

Answer 1

您想在选中复选框时删除数据，然后您可以执行以下操作，

   foreach (GridViewRow grow in gvServiceProviders.Rows)
    {
       //Make sure it is datarow
       if(grow.RowType = RowType.DataControlRowType.DataRow)
       {
          //Finiding checkbox control in gridview for particular row
          CheckBox chkdelete = (CheckBox)grow.FindControl("cbSelect");

          //Make sure if checkbox is selected for the processing row
          if(chkdelete.Checked)
          {
            //Getting your datakey value
            bll.ServiceProviderLocationID = Convert.ToInt32(gvServiceProviders.DataKeys[grow.RowIndex].Value);
            bll.IsDeleted = "y";
            bll.ServiceProviderLocationDelete(); 
          }             
       }
    }
    gvServiceProviders.DataSource = bll.GetServiceProviderLocations();
    gvServiceProviders.DataBind();

由于这是使用网格视图的datakey，您需要使用 LocationID 设置网格视图的DataKey 属性。

Answer 2

Try this code:
protected void btnDelete_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvrow in gvDetails.Rows)
{
//Finiding checkbox control in gridview for particular row
CheckBox chkdelete = (CheckBox)gvrow.FindControl("chkSelect");
//Condition to check checkbox selected or not
if (chkdelete.Checked)
{
//Getting UserId of particular row using datakey value
int usrid = Convert.ToInt32(gvDetails.DataKeys[gvrow.RowIndex].Value);
using (SqlConnection con = new SqlConnection("Data Source=Test;Integrated Security=true;Initial Catalog=MySampleDB"))
{
con.Open();
SqlCommand cmd = new SqlCommand("delete from UserDetails where UserId=" + usrid, con);
cmd.ExecuteNonQuery();
con.Close();
}
}
}