GridView编辑按钮问题。

Question

 protected void gv_Topic_RowDataBound(object sender, GridViewRowEventArgs e)
 { 
   if (e.Row.RowState == DataControlRowState.Edit）
            {
                DropDownList ddl_Template = (DropDownList)(e.Row.Cells[1].FindControl("ddl_Template"));
                ddl_Template.DataSource = Control.TopicList.GetTopicTemplate();//获得数据源
                ddl_Template.DataTextField = "Name";
                ddl_Template.DataValueField = "ID";
                ddl_Template.DataBind();
                ddl_Template.Items.Insert(0, new ListItem("无", "null"));
                ddl_Template.SelectedIndex = 3;                DropDownList ddl_Style = (DropDownList)(e.Row.Cells[2].FindControl("ddl_Style"));
                ddl_Style.DataSource = Control.TopicList.GetStyle();//获得数据源
                ddl_Style.DataTextField = "Name";
                ddl_Style.DataValueField = "CssstyleId";
                ddl_Style.DataBind();
                ddl_Style.Items.Insert(0, new ListItem("无", "null"));
            }
}这是为了给GridView的模板列中的DropDownList控件赋值，但是问什么我的程序只有点击GridView中的第一行的"编辑"时，e.Row.RowState的值才是edit,点击其他行是状态都是normal也就是只有点击第一行的"编辑"时才执行这段代码，点击其他行的"编辑"时就不执行，高手帮忙解释一下，在线等~~

Answer 1

因为你DropDownList 控件没有找对，
FindControl("ddl_Template")这句话找的始终是第一个DropDownList ，把他改为
ddl_Template.ClientID试试

Answer 2

编辑  是如何绑定在模版列里面的???
应该是这里出了问题 !!
 protected void gv_Topic_RowDataBound(object sender, GridViewRowEventArgs e) 
 {  
   if (e.Row.RowState == DataControlRowState.Edit） 
            { 
    这里先弄个输出还是附值..看看 !有数据?
            } 
} 

Answer 3

protected void gv_Topic_RowDataBound(object sender, GridViewRowEventArgs e) 
 {  
   if (e.Row.RowState == DataControlRowState.Edit） 
            { 
                DropDownList ddl_Template = (DropDownList)(e.Row.Cells[1].FindControl("ddl_Template")); 
                ddl_Template.DataSource = Control.TopicList.GetTopicTemplate();//获得数据源 
                ddl_Template.DataTextField = "Name"; 
                ddl_Template.DataValueField = "ID"; 
                ddl_Template.DataBind(); 
                ddl_Template.Items.Insert(0, new ListItem("无", "null")); 
                ddl_Template.SelectedIndex = 3;                 DropDownList ddl_Style = (DropDownList)(e.Row.Cells[2].FindControl("ddl_Style")); 
                ddl_Style.DataSource = Control.TopicList.GetStyle();//获得数据源 
                ddl_Style.DataTextField = "Name"; 
                ddl_Style.DataValueField = "CssstyleId"; 
                ddl_Style.DataBind(); 
                ddl_Style.Items.Insert(0, new ListItem("无", "null")); 
            } 
} 把ddl_Template表与原对象重名试试

Answer 4

我找到问题了，交替项的编辑状态时的State为Alternate | Edit.要在if(...)里面再加个条件，谢谢你们了。

Answer 5

            if (e.Row.RowState == DataControlRowState.Edit || e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit))//&& e.Row.RowType == DataControlRowType.DataRow
            {
                DropDownList ddl_Template = (DropDownList)(e.Row.Cells[1].FindControl("ddl_Template"));
                ddl_Template.DataSource = Control.TopicList.GetTopicTemplate();
                ddl_Template.DataTextField = "Name";
                ddl_Template.DataValueField = "ID";
                ddl_Template.DataBind();
                ddl_Template.Items.Insert(0, new ListItem("无", "null"));
                ddl_Template.SelectedIndex = 3;                DropDownList ddl_Style = (DropDownList)(e.Row.Cells[2].FindControl("ddl_Style"));
                ddl_Style.DataSource = Control.TopicList.GetStyle();
                ddl_Style.DataTextField = "Name";
                ddl_Style.DataValueField = "CssstyleId";
                ddl_Style.DataBind();
                ddl_Style.Items.Insert(0, new ListItem("无", "null"));
            }
这样就OK了，:D