格式化DataGrid的例子【将数据源中的0,1值转换成实际的文字】
格式化DataGrid的例子【将数据原中的0,1值转换成实际的文字】
http://lucky_elove.www1.dotnetplayground.com/
下面的代码实现格式化DataGrid的列，也即是将数据原中的0,1值转换成实际的文字的功能，主要是在数据绑定的帮定事件。
首先准备数据源，数据源采用数据库、XML、数组等都可以。下面以XML做例子。Contacts.xml文件如下：
<xmp> <contacts> <contact> <email>[email protected]</email> <firstname>E章</firstname> <lastname>孟子</lastname> <manager>0</manager> </contact> <contact> <email>[email protected]</email> <firstname>宪会</firstname> <lastname>孟</lastname> <manager>1</manager> </contact> <contact> <email>[email protected]</email> <firstname>Lover</firstname> <lastname>Net</lastname> <manager>0</manager> </contact> <contact> <email>[email protected]</email> <firstname>NET开发者园地</firstname> <lastname> <manager>0</manager> </lastname></contact> <contact> <email>[email protected]</email> <firstname>XML开发者园地</firstname> <lastname> <manager>1</manager> </lastname></contact> </contacts> </xmp>FormatDataGridVB.aspx
<xmp><%@ Page Language="vb" AutoEventWireup="false" Codebehind="FormatDataGridVB.aspx.vb" Inherits="aspxWeb.FormatDataGridVB" %> <html> <head> <meta name="GENERATOR" content="Microsoft Visual Studio 7.0"> <meta name="CODE_LANGUAGE" content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </head> <body> <asp:label id="MyTitle" font-bold="True" runat="server"></asp:label><asp:datagrid autogeneratecolumns="False" id="FormatDataGrid" width="100%" runat="server"> <headerstyle font-bold="True"></headerstyle> <columns> <asp:templatecolumn> <itemtemplate> <asp:label text="<%# FormatFullName(DataBinder.Eval(Container, " dataitem.firstname"),_="" databinder.eval(container,="" "dataitem.lastname"))="" %="">" id="Label1" runat="server"> </asp:label> </itemtemplate> </asp:templatecolumn> <asp:boundcolumn readonly="True" datafield="Email"></asp:boundcolumn> <asp:boundcolumn readonly="True" datafield="Manager"> <headerstyle horizontalalign="Center"></headerstyle> <itemstyle horizontalalign="Center"></itemstyle> </asp:boundcolumn> </columns> </asp:datagrid> </body> </html> </xmp>
FormatDataGridVB.aspx.vb
<xmp>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 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 _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【将数据原中的0,1值转换成实际的文字】" FormatDataGrid.Columns(0).HeaderText = "姓名" FormatDataGrid.Columns(1).HeaderText = "电子邮件" FormatDataGrid.Columns(2).HeaderText = "职位" ' 装载XML数据原，注意：这里与数据原类型没有关系，换成数据库也是适用的 _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 ' 只在页面首次请求时才进行数据绑定 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 ' 格式划名称列 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 ' 确保处理的是数据行，而不是Header或者Footer If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then ' 得到Manager字段的值 Dim isManager As String = CType(DataBinder.Eval(e.Item.DataItem, "Manager"), String) If isManager = "1" Then ' 设定文字和背景颜色 e.Item.Cells(2).Text = "经理" 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 = "普通员工" End If End If End Sub End Class </xmp>C#版本
<xmp>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) { // 装载XML数据原，注意：这里与数据原类型没有关系，换成数据库也是适用的 _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) { // 格式划名称列 return (string)LastName + ", " + (string)FirstName; } protected void FormatDataGrid_ItemDataBound(object source, System.Web.UI.WebControls.DataGridItemEventArgs e) { // 确保处理的是数据行，而不是Header或者Footer if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { // 得到Manager字段的值 string isManager = (string)DataBinder.Eval(e.Item.DataItem, "Manager"); if (isManager == "1") { // ' 设定文字和背景颜色 e.Item.Cells[2].Text = "经理" 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 = "普通员工"; } } } } </xmp>