详细信息视图下拉列表问题::更新时不会更新到DB [英] Detail View Dropdownlist Issue:: When updating it is not updating to DB

问题描述

以下是代码段。我有一个详细信息视图，在选择两个下拉列表时填充，我已将所需的字段转换为模板，然后从文本框更改为带有数据限制的下拉列表。现在，当我编辑详细信息视图并从下拉列表中选择项目并单击提交时，它不会更新到数据库，而是将空白值存储在数据库中。请帮助。

Below is the Code Snippet. I have a Detail View which is populated on selecting two Dropdownlist, I have converted the required Field to Template and then Changed from Text Box to Drop down list with Data bounded. Now when I edit the Detail View and Select a item from Dropdownlist and click on Submit it is not updated to DB, instead a blank value is stored in DB. Please Help.

<EditItemTemplate>
                        <asp:DropDownList ID="DropDownList2" runat="server" AppendDataBoundItems="true" 
                            DataSourceID="AccessDataSource5" DataTextField='<%# Bind("Project_or_Track") %>'  
                            DataValueField="DropDown" >
                        </asp:DropDownList>
                    </EditItemTemplate>

推荐答案

你必须定义一个更新数据源的查询，这将更新数据库。

You have to define an update query on your Datasource which will update the database.

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