通过DATAVIEW自动生的DATAGRID列，如何取得列标题

不行的，我试过了，自动生成的列DataGrid1.Columns.count的值是0

private void Button1_Click(object sender, System.EventArgs e)
        {
            foreach(DataGridItem row in DataGrid1.Controls[0].Controls)
                if(row.ItemType == ListItemType.Header)
                    Response.Write(row.Cells[0].Text);
        }

你只能从DataGrid1.Controls[0].Controls中检索，找到Header这一行，然后就可以得到里面的值：
private void Button1_Click(object sender, System.EventArgs e)
{
    foreach(DataGridItem row in DataGrid1.Controls[0].Controls)
    {
        if(row.ItemType == ListItemType.Header)
        {
            Response.Write(row.Cells[列索引].Text);
            break;
        }
    }
}

直接取你綁定的table的名稱也可以啊!ds.Tables[0].Columns[0].ColumnName

我是用VB的，但意思也差不多。
在DATAGRID里有十多列，前面十列是肯定有了的，而且名称也是固定的，我们就从第十一列开始取它的列标题，我这样写：
For J = 10 To Dg.Items(I).Cells.Count - 1
              For Each DgItem As DataGridItem In Dg.Controls(0).Controls '.Controls
                If DgItem.ItemType = ListItemType.Header Then
                    Response.Write "第" & j & "列标题是：" & DgItem.Cells(J).Text
                  Exit For
                End If
              Next
            Next但出来的标题都是空的，为什么呀？

你可以对照一下完整的例子：<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm4.aspx.vb" Inherits="vb_bs_2006.WebForm4"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm4</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:DataGrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 48px; POSITION: absolute; TOP: 200px"
runat="server" Width="408px" Height="184px"></asp:DataGrid>
<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 512px; POSITION: absolute; TOP: 304px" runat="server"
Text="Button"></asp:Button></FONT>
</form>
</body>
</HTML>
*********************************
Public Class WebForm4
    Inherits System.Web.UI.Page#Region " Web 窗体设计器生成的代码 "    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()    End Sub
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid
    Protected WithEvents Button1 As System.Web.UI.WebControls.Button    '注意: 以下占位符声明是 Web 窗体设计器所必需的。
    '不要删除或移动它。
    Private designerPlaceholderDeclaration As System.Object    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub#End Region    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        '在此处放置初始化页的用户代码
        If Not Me.IsPostBack Then
            BindData()
        End If
    End Sub
    Private Sub BindData()
        Dim dt As New DataTable
        dt.Columns.Add("field1")
        dt.Columns.Add("field2")
        dt.Columns.Add("field3")
        dt.Columns.Add("field4")
        For i As Integer = 1 To 20
            Dim dr As DataRow = dt.NewRow()
            dr(0) = i
            dr(1) = i + i
            dr(2) = i * i
            dr(3) = Now
            dt.Rows.Add(dr)
        Next
        dt.AcceptChanges()        Me.DataGrid1.DataSource = dt
        Me.DataGrid1.DataBind()
    End Sub    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click        For Each DgItem As DataGridItem In DataGrid1.Controls(0).Controls '.Controls
            If DgItem.ItemType = ListItemType.Header Then
                For J As Integer = 1 To DgItem.Cells.Count - 1
                    Response.Write("第" & J + 1 & "列标题是：" & DgItem.Cells(J).Text & "<br>")
                Next
                Exit For
            End If
        Next
    End Sub
End Class

调试易

通过DATAVIEW自动生的DATAGRID列，如何取得列标题

解决方案 »