下面的代碼實現格式化DataGrid的列，也即是將資料原中的0,1值轉換成實際的文字的功能，主要是在資料繫結的幫定事件。
查看例子
首先準備資料來源，資料來源採用資料庫、XML、數組等都可以。下面以XML做例子。Contacts.xml檔案如下：
<?xml version="1.0" encoding="gb2312" standalone="yes"?>
<Contacts>
<Contact>
<Email>myaddress@mycompany.com</Email>
<FirstName>E章</FirstName>
<LastName>孟子</LastName>
<Manager>0</Manager>
</Contact>
<Contact>
<Email>youraddress@yourcompany.com</Email>
<FirstName>憲會</FirstName>
<LastName>孟</LastName>
<Manager>1</Manager>
</Contact>
<Contact>
<Email>mm@mmm.mm</Email>
<FirstName>Lover</FirstName>
<LastName>Net</LastName>
<Manager>0</Manager>
</Contact>
<Contact>
<Email>xxx@xxxx.xx</Email>
<FirstName>NET開發人員園地</FirstName>
<LastName/>
<Manager>0</Manager>
</Contact>
<Contact>
<Email>hhh@hhh.hh</Email>
<FirstName>XML開發人員園地</FirstName>
<LastName/>
<Manager>1</Manager>
</Contact>
</Contacts>
FormatDataGridVB.ASPx
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="FormatDataGridVB.aspx.vb"
Inherits="aspx<a href="http://dev.21tx.com/web/" target="_blank">Web</a>.FormatDataGridVB" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
<meta name="CODE_LANGUAGE" Content="<a href="http://dev.21tx.com/dotnet/csharp/" target="_blank">C#</a>">
<meta name="vs_defaultClientScript" content="<a href="http://dev.21tx.com/web/javascript/" target="_blank">JavaScript</a>">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="idbSample" method="post" runat="server" class="SubHeading">
<asp:Label ID="MyTitle" runat="server" Font-Bold="True"></asp:Label>
<br>
<br>
<asp:DataGrid id="FormatDataGrid" runat="server" AutoGenerateColumns="False" Width="100%">
<HeaderStyle Font-Bold="True"></HeaderStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<asp:Label
Text='<%# FormatFullName(DataBinder.Eval(Container, "DataItem.FirstName"),_
DataBinder.Eval(Container, "DataItem.LastName")) %>'
runat="server" ID="Label1">
</asp:Label>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="Email" ReadOnly="True"></asp:BoundColumn>
<asp:BoundColumn DataField="Manager" ReadOnly="True">
<HeaderStyle HorizontalAlign="Center"></HeaderStyle>
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:BoundColumn>
</Columns>
</asp:DataGrid>
</form>
</body>
</HTML>
FormatDataGridVB.aspx.vb
Imports System
Imports System.Data
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Xml
Public Class FormatDataGridVB
Inherits System.Web.UI.Page
Protected WithEvents FormatDataGrid As System.Web.UI.WebControls.DataGrid
Protected WithEvents MyTitle As System.Web.UI.WebControls.Label
#Region " Web Form設計器產生的程式碼 "
'該調用是 Web Form設計器所必需的。
<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: 此方法調用是 Web Form設計器所必需的
'不要使用代碼編輯器修改它。
InitializeComponent()
End Sub
#End Region
Private _dsContacts As DataSet
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
MyTitle.Text = "格式化DataGrid的例子【將資料原中的0,1值轉換成實際的文字】"
FormatDataGrid.Columns(0).HeaderText = "姓名"
FormatDataGrid.Columns(1).HeaderText = "電子郵件"
FormatDataGrid.Columns(2).HeaderText = "職位"
' 裝載XML資料原，注意：這裡與資料原類型沒有關係，換成資料庫也是適用的
_dsContacts = New DataSet()
_dsContacts.ReadXml(Server.MapPath("Contacts.xml"))
Dim dcPk As DataColumn() = {_dsContacts.Tables("Contact").Columns("Email")}
_dsContacts.Tables("Contact").PrimaryKey = dcPk
If Not Page.IsPostBack Then
' 只在頁面首次請求時才進行資料繫結
BindContacts()
End If
End Sub
Private Sub BindContacts()
Dim dv As DataView = New DataView(_dsContacts.Tables("Contact"))
dv.Sort = "LastName, FirstName"
FormatDataGrid.DataSource = dv
FormatDataGrid.DataBind()
End Sub
Protected Function FormatFullName(ByVal FirstName As Object, ByVal LastName As Object) As String
' 格式劃名稱列
Return CType(LastName, String) & "." & CType(FirstName, String)
End Function
Private Sub FormatDataGrid_ItemDataBound(ByVal sender As Object,_
ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles FormatDataGrid.ItemDataBound
' 確保處理的是資料行，而不是Header或者Footer
If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
' 得到Manager欄位的值
Dim isManager As String = CType(DataBinder.Eval(e.Item.DataItem, "Manager"), String)
If isManager = "1" Then
' 設定文字和背景顏色
e.Item.Cells(2).Text = "經理"
e.Item.Cells(2).Style.Add("font-weight", "bold")
e.Item.Cells(2).ForeColor = System.Drawing.Color.Red
e.Item.BackColor = System.Drawing.Color.AliceBlue
Else
e.Item.Cells(2).Text = "普通員工"
End If
End If
End Sub
End Class
C#版本
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
/// <summary>
/// Summary description for idbSample.
/// </summary>
public class idbSample : System.Web.UI.Page
{
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.dgContacts.ItemDataBound +=
new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgContacts_ItemDataBound);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
protected System.Web.UI.WebControls.DataGrid FormatDataGrid;
private DataSet _dsContacts;
private void Page_Load(object sender, System.EventArgs e)
{
// 裝載XML資料原，注意：這裡與資料原類型沒有關係，換成資料庫也是適用的
_dsContacts = new DataSet();
_dsContacts.ReadXml(Server.MapPath("Contacts.xml"));
DataColumn[] dcPk = {_dsContacts.Tables["Contact"].Columns["Email"]};
_dsContacts.Tables["Contact"].PrimaryKey = dcPk;
if (!Page.IsPostBack )
{
BindContacts();
}
}
private void BindContacts()
{
DataView dv = new DataView(_dsContacts.Tables["Contact"]);
dv.Sort = "LastName, FirstName";
dgContacts.DataSource = dv;
dgContacts.DataBind();
}
protected string FormatFullName(object FirstName, object LastName)
{
// 格式劃名稱列
return (string)LastName + ", " + (string)FirstName;
}
protected void FormatDataGrid_ItemDataBound(object source,
System.Web.UI.WebControls.DataGridItemEventArgs e)
{
// 確保處理的是資料行，而不是Header或者Footer
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
// 得到Manager欄位的值
string isManager = (string)DataBinder.Eval(e.Item.DataItem, "Manager");
if (isManager == "1")
{
// ' 設定文字和背景顏色
e.Item.Cells[2].Text = "經理"
e.Item.Cells[2].Style.Add("font-weight", "bold")
e.Item.Cells[2].ForeColor = System.Drawing.Color.Red
e.Item.BackColor = System.Drawing.Color.AliceBlue
}
else
{
e.Item.Cells[2].Text = "普通員工";
}
}
}
}
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