网格视图更新问题 [英] grid view update problem

问题描述

我有一个下拉列表，当用户选择其他下拉列表时，它会打开一个面板文本框.现在，当用户在文本框中输入文本时
它可以成功保存，但问题是用户尝试对其进行编辑时会显示如下消息.

-SelectedValue无效，因为它不存在于项目列表中.
参数名称:值
代码:

Hi,
I have one dropdownlist in that when user select others its opens a panel textbox. now when user enter text in textbox
it saves successfully but the problem is when user try to edit it show s the message like this.

-- SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value
code:

btncancel.Visible = true;
              
               if (ddlFeedtype.SelectedItem.Text == "Others")
               {

                   txtOtherfeed.Text = dtfillplantrecorddet.Rows[0]["feedtype"].ToString();
               }
               else
               {
                   ddlFeedtype.SelectedValue = dtfillplantrecorddet.Rows[0]["feedtype"].ToString();
               }
    
              
           //    ddlFeedtype.SelectedValue = dtfillplantrecorddet.Rows[0]["feedtype"].ToString();

推荐答案

请向您显示代码以供审核......

Please show you code for review ......

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