显示和隐藏DataGrid中的列

2022-07-15 80酷酷网 80kuku.com

　　datagrid|显示要显示和隐藏DataGrid中的列，最关键的是AutoGenerateColumns设置为False：下面就是实现这一功能的aspx代码和脚本代码：

<% Page Language="vb" AutoEventWireup="false" Codebehind="ShowHideCols.aspx.vb"
Inherits="aspxWeb.ShowHideCols"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD html 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>ShowHideCols</title>
<meta name="GENERATOR" content="Microsoft Visual Studio.NET 7.0">
<meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
<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">
<asp:Button ID="btnShow" Text="Show Details" OnClick="ShowDetails" Runat="server" />
<asp:Button ID="btnHide" Text="Hide Details" OnClick="HideDetails" Runat="server" />
<asp:DataGrid ID="dtgCusts" Runat="server" AutoGenerateColumns="False"
BorderColor="#999999" Border BorderWidth="1px" BackColor="White"
CellPadding="3" GridLines="Vertical">
<Columns>
<asp:BoundColumn DataField="Title" />
<asp:BoundColumn DataField="id" Visible="False" />
<asp:BoundColumn DataField="CreateDate" DataFormatString="{0:yyyy-MM-dd HH:mm:ss}"
Visible="False" />
<asp:EditCommandColumn EditText="Edit" HeaderText="Edit" Visible="False" />
</Columns>
<AlternatingItemStyle BackColor="#DCDCDC" />
<ItemStyle ForeColor="Black" BackColor="#EEEEEE" />
<headerStyle Font-Bold="True" ForeColor="White" BackColor="#000084" />
</asp:DataGrid>
</form>
</body>
</HTML>

后代码脚本

Imports System.Data
Imports System.Data.OleDb

Public Class ShowHideCols
Inherits System.Web.UI.Page
Protected WithEvents btnShow As System.Web.UI.WebControls.Button
Protected WithEvents btnHide As System.Web.UI.WebControls.Button
Protected WithEvents dtgCusts As System.Web.UI.WebControls.DataGrid

#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

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
btnShow.Text = "显示列"
btnHide.Text = "隐藏列"
dtgCusts.Columns(1).HeaderText = ""
dtgCusts.Columns(0).HeaderText = "标题"
dtgCusts.Columns(2).HeaderText = "发布日期"
dtgCusts.Columns(3).HeaderText = "编辑"
If Not IsPostBack Then
BindTheData()
End If
End Sub

Sub BindTheData()
Dim objConn As OleDbConnection
Dim objCmd As OleDbCommand
objConn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" _
+ Server.MapPath("Test.mdb"))
Dim strSql As String
strSql = "SELECT Top 10 id,Title,CreateDate FROM Document"
objCmd = New OleDbCommand(strSql, objConn)
objConn.Open()
dtgCusts.DataSource = objCmd.ExecuteReader()
dtgCusts.DataBind()
objConn.Close()
objConn.Dispose()
End Sub
Sub ShowDetails(ByVal sender As System.Object, ByVal e As System.EventArgs)
Dim intCounter As Integer
For intCounter = 1 To dtgCusts.Columns.Count - 1
dtgCusts.Columns(intCounter).Visible = True
Next
End Sub

Sub HideDetails(ByVal sender As System.Object, ByVal e As System.EventArgs)
Dim intCounter As Integer
For intCounter = 1 To dtgCusts.Columns.Count - 1
dtgCusts.Columns(intCounter).Visible = False
Next
End Sub

End Class