以编程方式将ButtonColumn从DataTable添加到GridView [英] Programmatically Add ButtonColumn to GridView From DataTable

问题描述

正如你从下面的代码中看到的那样，GridView的数据源是一个DataTable。我需要用一个按钮在表格中添加一个额外的列。

从下面的代码中，我收到一条错误消息：

值类型'System.Windows.Forms.DataGridViewButtonColumn'不能
转换为'System.Web.UI.WebControls.DataControlField'。

  Dim dt_AllGroupsSetUp2 As New DataTable（）
 dt_AllGroupsSetUp2.Columns.Add（Name，Type.GetType（System.String））
 dt_AllGroupsSetUp2 .Columns.Add（Age，Type.GetType（System.String））
 dt_AllGroupsSetUp2.Columns.Add（Hight，Type.GetType（System.String））
 
 For i As Integer = 0 To 7 
 dt_AllGroupsSetUp2.Rows.Add（）
 dt_AllGroupsSetUp2.Rows（i）（0）=John
 dt_AllGroupsSetUp2.Rows（i）（ 1）= 10 
 dt_AllGroupsSetUp2.Rows（i）（2）= 70 
 Next 
 
 GV_DataByGroupAct.DataSource = dt_AllGroupsSetUp2 
 Dim buttonColumn As New DataGridViewButtonColumn 
 buttonColumn.Name =Button
 GV_DataByGroupAct.Columns.Add（buttonColumn）
 GV_DataByGroupAct.DataBind（）
  

也返回了以下错误：'New'不能用于声明为'MustInherit'的类。

  GV_DataByGroupAct.DataSource = dt_AllGroupsSetUp2 
 Dim buttonColumn As New DataControlField 
 GV_DataByGroupAct.Columns.Add（buttonColumn）
 GV_DataByGroupAct.DataBind（）
  

有什么想法？

谢谢

解决方案在后面的代码中，使用这个将数据绑定到GridView（但它是c＃）之前：

  GV_DataByGroupAct.Columns。 Add（new ButtonField（）{Text =Button}）; 
  

或者您可以使用按钮字段准备GridView

 < asp：GridView ID =GV_DataByGroupActrunat =serverAutoGenerateColumns =False> 
<列> 
< asp：BoundField DataField =NameHeaderText =Name/> 
< asp：BoundField DataField =AgeHeaderText =Age/> 
< asp：BoundField DataField =HightHeaderText =Hight/> 
< asp：ButtonField Text =Button/> 
< /列> 
< / asp：GridView> 
  

绑定后您将得到以下结果：

I have a problem adding a column with buttons in GridView.

As you see from the code below, the data source from teh GridView is a DataTable. I need to add an additional column to the table with a button.

From the code below, I get an error message saying:

Value of type 'System.Windows.Forms.DataGridViewButtonColumn' cannot be converted to 'System.Web.UI.WebControls.DataControlField'.

    Dim dt_AllGroupsSetUp2 As New DataTable()
    dt_AllGroupsSetUp2.Columns.Add("Name", Type.GetType("System.String"))
    dt_AllGroupsSetUp2.Columns.Add("Age", Type.GetType("System.String"))
    dt_AllGroupsSetUp2.Columns.Add("Hight", Type.GetType("System.String"))

    For i As Integer = 0 To 7
        dt_AllGroupsSetUp2.Rows.Add()
        dt_AllGroupsSetUp2.Rows(i)(0) = "John"
        dt_AllGroupsSetUp2.Rows(i)(1) = 10
        dt_AllGroupsSetUp2.Rows(i)(2) = 70
    Next

    GV_DataByGroupAct.DataSource = dt_AllGroupsSetUp2
    Dim buttonColumn As New DataGridViewButtonColumn
    buttonColumn.Name = "Button"
    GV_DataByGroupAct.Columns.Add(buttonColumn)
    GV_DataByGroupAct.DataBind()

I tried the folling also but returned the following error: 'New' cannot be used on a class that is declared 'MustInherit'.

    GV_DataByGroupAct.DataSource = dt_AllGroupsSetUp2
    Dim buttonColumn As New DataControlField
    GV_DataByGroupAct.Columns.Add(buttonColumn)
    GV_DataByGroupAct.DataBind()

Any ideas?

Thanks

解决方案

In the code behind use this before binding data to GridView (but it's c#):

GV_DataByGroupAct.Columns.Add(new ButtonField() { Text = "Button" });

Or you could prepare the GridView with the button field

    <asp:GridView ID="GV_DataByGroupAct" runat="server" AutoGenerateColumns="False">
        <Columns>
            <asp:BoundField DataField="Name" HeaderText="Name" />
            <asp:BoundField DataField="Age" HeaderText="Age" />
            <asp:BoundField DataField="Hight" HeaderText="Hight" />
            <asp:ButtonField Text="Button" />
        </Columns>
    </asp:GridView>

after bind you will have this result:

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