查找列表视图控件 [英] Find List view control

问题描述

嗨
我必须在单击按钮时编辑列表视图，然后再进行更新.
我的代码生成错误....对象引用未设置为对象的实例."
我的代码如下.....

 受保护的  Sub  btnedit_Click( ByVal 发​​件人 As  对象， ByVal  e  As  System.EventArgs) Handles  btnedit.Click
 Dim  currentID  As  整数
         Dim  dblAmount1  As  整数
         Dim  dblAmount2  As  整数
   Dim  myAdapter  As  spGetFeeStructureTableAdapter
对于 每个项目 As  ListViewDataItem 位于 lvFeeStructure.Items中
           currentID = lvFeeStructure.DataKeys(item.DataItemIndex).Value
           intGradeID =  CType (ddlGrades.SelectedValue，整数)
           如果(item.ItemType = ListViewItemType.DataItem)然后
           dblAmount1 = Val( CType (item.FindControl " )，TextBox).Text)
                dblAmount2 = Val( CType (item.FindControl(" )，TextBox).Text)
myAdapter.UpdateFeeStructure(" ，intGradeID，dblAmount1，dblAmount2)
lvFeeStructure.DataBind()

结束 子 

请帮帮我.

如何在不使用listView控件的情况下找到ListView控件?

谢谢
Pooja Thakur

解决方案

如何在不使用列表视图对象的情况下查找.

尝试访问成员时会发生此错误的对象为null.
尝试调试代码以查看哪个控件引发此错误.

hi
I''ve to edit listview on button click and then update too.
my code generating an error...."Object reference not set to an instance of an object."
my code is as follows.....

Protected Sub btnedit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnedit.Click
Dim currentID As Integer
        Dim dblAmount1 As Integer
        Dim dblAmount2 As Integer
  Dim myAdapter As spGetFeeStructureTableAdapter
For Each item As ListViewDataItem In lvFeeStructure.Items
           currentID = lvFeeStructure.DataKeys(item.DataItemIndex).Value
           intGradeID = CType(ddlGrades.SelectedValue, Integer)
           If (item.ItemType = ListViewItemType.DataItem) Then
           dblAmount1 = Val(CType(item.FindControl "decMonth1TextBox"), TextBox).Text)
                dblAmount2 = Val(CType(item.FindControl("decMonth2TextBox "), TextBox).Text)
myAdapter.UpdateFeeStructure("CurrentID", intGradeID,dblAmount1 ,dblAmount2)
lvFeeStructure.DataBind()

End Sub

Please help me out.

How to find ListView Control without using listView control??

Thank You
Pooja Thakur

解决方案

How can u find without using list view Object.

This error occurs when you are trying access a member of an object that is null.
Try debugging through the code to see which control is throwing this error.

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