如何在edititemtemplate下拉列表中将itemtemplate标签文本显示为具有其他数据库值的选定值？ [英] how to show itemtemplate label text in edititemtemplate dropdownlist as selected value with other database values?

问题描述

亲爱的所有人，

我在itemtemplate和edititemtemplate中使用标签，我正在使用dropdownlist。当我点击gridview中的编辑链接时，我想显示带有标签文本的Dropdownlist作为选定值和其他数据库值。我尝试了很多解决方案，但没有奏效。我已经设置了autopostback true的下拉列表。这是我的代码 -



protected void gvTransport_OnRowDataBound（object sender，GridViewRowEventArgs e）

{

if（ e.Row.RowType == DataControlRowType.DataRow && gvTransport.EditIndex == e.Row.RowIndex）

{

/ * ...用于从dbo获取路由名称.Transport_Routes表... * /

DropDownList RouteName =（DropDownList）e.Row.FindControl（ddlRoute_ID）;

Label lblRName =（Label）e.Row .FindControl（lblRoute_ID）;



RouteName.DataSource = LoadStudentRoutes（）; //获取路径名称

RouteName.DataTextField =Route_Name;

RouteName.DataValueField =Route_ID;

RouteName.DataBind（ ）;



RouteName.Items.FindByText（lblRName.Text）.Selected = true;

}

}



但是点击编辑链接时不会触发编辑事件。在这种情况下请帮帮我。

谢谢和问候，

Rizwan Gazi。

Dear All,
I am using label in itemtemplate and in edititemtemplate, I am using dropdownlist. When I click on edit link in gridview, I want to show Dropdownlist with label's text as selected value with other database values. I tried many solutions, but didn't work. I have set autopostback true of dropdown. Here is my code -

protected void gvTransport_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow && gvTransport.EditIndex == e.Row.RowIndex)
{
/*... For getting Route Names from dbo.Transport_Routes table ...*/
DropDownList RouteName = (DropDownList)e.Row.FindControl("ddlRoute_ID");
Label lblRName = (Label)e.Row.FindControl("lblRoute_ID");

RouteName.DataSource = LoadStudentRoutes(); // To Get Route Names
RouteName.DataTextField = "Route_Name";
RouteName.DataValueField = "Route_ID";
RouteName.DataBind();

RouteName.Items.FindByText(lblRName.Text).Selected = true;
}
}

but edit event is not fired, when I click edit link. Please help me in this situation.
Thanks and regards,
Rizwan Gazi.

推荐答案

嗨Rizwan，以下是解决方案： -

1.首先，将下拉列表的自动后备设置为False

2.使用RowCommand事件网格视图，将编辑标签的值获取到ViewState中，如下所示： -

Hi Rizwan, Here is the solution:-
1. Firstly, Set autopostback of dropdownlist to "False"
2. With the use of RowCommand Event of the Grid View , Get the value of the Edited Label into the ViewState, As below:-

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
   {
       if (e.CommandName == "Edit")
       {
           GridViewRow gvRow = (GridViewRow)(((LinkButton)e.CommandSource).NamingContainer);

           Label lbl = (Label)gvRow.FindControl("Label1");
           ViewState["LabelValue"] = lbl.Text;

       }
   }

3.最后，使用viewstate并处理你的RowDataBound事件如下： -

3. Finally, Use viewstate and Handle your RowDataBound Event as below :-

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
   {
       if (e.Row.RowType == DataControlRowType.DataRow && GridView1.EditIndex == e.Row.RowIndex)
       {
           //Label lbl = (Label)e.Row.FindControl("Label1");
           DropDownList ddl = (DropDownList)e.Row.FindControl("DropDownList1");
           ddl.SelectedValue = ddl.Items.FindByText(Convert.ToString(ViewState["LabelValue"])).Value;
       }
   }

4.你的工作已经完成!!!



~谢谢

4. Your Job Is done !!!

~Thanks

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