Aspxgridview rowupdating e newvalues

答: 抛出这个异常时因为表格不能使用公用的借口来更新数据源 (这个异常适用于包含删除命令的所有编辑操作). 这意味着这个接口不能在这个对象上存在。比如,如果使用了 Data Table ,由于对象简单而且不能作为一个常规的数据源(比如Sql Data Source)来被编辑所以会抛出这个异常。一个可能的解决方案是手动处理下面的事件和手动更新:问: 在 Data Item Template里我使用了一个按钮。在运行一个表格回调(比如,排序,过滤,等等)后,为什么按钮点击事件没有被触发?答: 在Data Item Template中的一个控件使用一个静态ID时,这个问题会经常发生。在这种情况下,多种控件实例以同样的ID来被创建。因此,不可能来决定哪一个按钮执行一个回传到服务器,而且在处理表格回调时原始数据不能被正确的加载。为了解决这个问题,可以为每一个模板控件定义一个唯一的ID。比如,你可以在基于行关键字的控件初始事件处理函数中来定义:问: 当详细表格被更新后,怎样刷新一个主表格? 答: 默认情况下, ASPx Grid View通过回调来运行。这意味着表格可以更新它自己的表现,但不会更新外部控件的表现。当主表格和明细表格有一个共同的记录时,你将在改变明细表格后不会看到主表格有变化。通过调用刷新方法来更新主表格是有必要的。 在 ASPx Grid View - How to refresh a master grid when updating a detail grid展现了最简洁的代码问: 怎样使用ASPx Grid Lookup 在ASPx Grid View中编辑项目模板? 答: 如果数据绑定表达式被替换为运行时绑定代码(ASPx Grid View - Using ASPx Grid Lookup with the editing functionality inside Edit Item Template causes an exception),可以解决这个异常。 当编辑表格查看记录不是必须的,双向数据绑定表达式将使代码更简洁: How to use two-way data-bound ASPx Grid Lookup in edit form of ASPx Grid View to edit data.问:在过滤行弹出式菜单中怎样改变默认过滤器条件?On clicking the delete button, i get the row deleted from the DB. I am using a simple Gridview to display the emp id (as a link for selecting), emp name, emp Age. Using the delete button, the record can be deleted. You indicate that it is the former so that your update command isn't executing. NET Grid View - Add a new record I had the same problem.But, Update is not working as it is suppsoed to work. But the Edit-Update/Cancel functinality is not working. The old values are not updated with the new values. I found that in Visual Web Developer I had to specify the "Data Key Names" property of the Grid View as the primary key for my database table. So I clicked on the Grid View and in the Properties tab, I typed "id" (no quotes) in the "Data Key Names" box. I found that in Visual Web Developer I had to specify the "Data Key Names" property of the Grid View as the primary key for my database table. So I clicked on the Grid View and in the Properties tab, I typed "id" (no quotes) in the "Data Key Names" box.Protected Sub grid_Custom Callback(By Val sender As Object, By Val e As Dev Express. Data Source = CType(Session("Dt2"), Data Table) End If Else grid. Data Bind() End Sub Protected Sub grid_Row Updating(By Val sender As Object, By Val e As Dev Express. Clone() Dim New Dt As Data Table Dim Dt1 As Data Table If Session("Dt2"). Copy() Else Dt1 = CType(View State("Dt1"), Data Table) End If New Dt = Dt1.

Because of this, the Grid View was rebinding itself before the UPDATE occurred.

问: 有没有可能使用Javascript来复制被选择的/聚焦的行值到剪贴板上?答: 由于安全原因,不可能使用Javascript来操作剪贴板。但是你可以在网上: How to Copy to Clipboard in Java Script上找到一个的可能的方案.问: 如果asp: File Upload 控件被放在编辑表上,在更新操作期间为什么不能发送文件到服务器?

答: 当你工作在回调上时,文件上传工具不会传送文件到服务器端。你应该禁用Enable Call Backs 属性来时代码工作。有可能使用表格的回调和ASPx Upload Control组件来上传文件。在这种情况下,两种请求是必须的:一个必须被发送来上传文件和存放在服务器上的某处,另一个被发送用来执行更新:Image Upload in ASPx Grid View How to upload files from the Edit Form Inserting of a new row in ASPx Grid View with the image preview enabled问:当 Image Button被用在ASPx Grid View上,为什么要点击这个按钮两次才能发送一个命令到服务器 ?

End Users Can Update their rows by cliking on Edit image button.

Problem : Whenever user updates the row it affects only on 1st row of the Grid.

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