ASP.Net 如何在编辑(图像按钮)单击时绑定网格视图的编辑项模板中的下拉列表列表控件

本文关键字：编辑 控件 视图 网格 下拉列表 绑定 列表 Net 图像 单击 按钮 | 更新日期: 2023-09-27 18:30:22

我需要在GridView的EditItemTemplate中绑定 ASP.Net DropDownList控件。我有一个带有命令名称="编辑"的编辑图像按钮也需要从不同的表（目录）绑定下拉列表，而不是绑定网格的表（详细信息）。

if (e.Row.RowType == DataControlRowType.DataRow && (e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit && GridView1.EditIndex == e.Row.RowIndex)
 {
    DropDownList DStatusEdit = (DropDownList)e.Row.FindControl("DStatusEdit");
    string query = "select distinct status from directory";
    SqlCommand cmd = new SqlCommand(query);
    DStatusEdit.DataSource = GetData(cmd);
    DStatusEdit.DataTextField = "status";
    DStatusEdit.DataValueField = "status"; DStatusEdit.DataBind();     
    DataStatusEdit.DataBind();
 }

页面正在运行，但是当我单击"编辑图像"按钮时，dropdwn显示，但下拉列表中没有数据绑定，它是空的。我的网格视图位于更新面板中。我怎样才能做到这一点？在我的情况下，下拉列表应该绑定在rowcommand中，但是如何绑定？

ASP.Net 如何在编辑(图像按钮)单击时绑定网格视图的编辑项模板中的下拉列表列表控件

protected void gv_RowDataBound(object sender, GridViewEditEventArgs e)
{
   if (e.Row.RowType == DataControlRowType.DataRow)
      {
            if ((e.Row.RowState & DataControlRowState.Edit) > 0)
            {
              DropDownList DStatusEdit= (DropDownList)e.Row.FindControl("DStatusEdit");
              DataTable dt = con.GetData("select distinct status from directory");
              DStatusEdit.DataSource = dt;
              DStatusEdit.DataTextField = "status";
              DStatusEdit.DataValueField = "status";
              DStatusEdit.DataBind();
              DataRowView dr = e.Row.DataItem as DataRowView;
              DStatusEdit.SelectedValue = dr["columnname"].ToString();
            }
       }
    }
 }
    protected void gv_RowEditing(object sender, GridViewEditEventArgs e)
    {
      gv.EditIndex = e.NewEditIndex;
      gridviewBind();// your gridview binding function
    }

您忘记绑定下拉列表

DStatusEdit.DataBind();

protected void GridView2_RowDataBound（Object sender， GridViewRowEventArgs e） {

    using (SqlConnection con = new SqlConnection(ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT GatePassNo,PurposeOfVisit FROM VisitorList"))
        {
            cmd.CommandType = CommandType.Text;
            cmd.Connection = con;
            con.Open();
            DropDownList ddlpurposeofvisit = (DropDownList)e.Row.FindControl("ddlpurposeofvisit");
            ddlpurposeofvisit.DataSource = cmd.ExecuteReader();
            ddlpurposeofvisit.DataTextField = "PurposeOfVisit";
            ddlpurposeofvisit.DataValueField = "GatePassNo";
            ddlpurposeofvisit.DataBind();
            con.Close();
        }
    }
}

我认为这很有帮助

private void bind_gridview_with_dropdownlist()
{
    DataSet ds = edtcoursedal.Loaddropdown();
    foreach (GridViewRow grdRow in GridView1.Rows)
    {
 DropDownList bind_dropdownlist = (DropDownList)(GridView1.FooterRow.Cells[3].FindControl("drplmaincourse"));
            bind_dropdownlist.DataSource = ds;
            bind_dropdownlist.DataTextField = "C_name";
            bind_dropdownlist.DataValueField = "MId";
            bind_dropdownlist.DataBind();
        }
    bind_dropdownlist.Items.Insert(0,new ListItem("Select","0"));
}
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