摘要:利用ASP.NET的CustomValidator來檢查TextBox的日期格式
原文：
http://www.dotblogs.com.tw/puma/archive/2008/03/21/1980.aspx
CustomValidatorTest.aspx
01 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="CustomValidatorTest.aspx.cs" Inherits="CustomValidatorTest" %>
02
03 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
04
05 <html xmlns="http://www.w3.org/1999/xhtml">
06 <head runat="server">
07 <title>CustomValidatorTest</title>
08 </head>
09 <body>
10 <form id="form1" runat="server">
11 <div>
12
13 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
14 <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="送出" />
15 <asp:CustomValidator ID="CustomValidator1" runat="server"
16 ControlToValidate="TextBox1" ErrorMessage="CustomValidator"
17 onservervalidate="CustomValidator1_ServerValidate" ValidateEmptyText="True"></asp:CustomValidator>
18
19 </div>
20 </form>
21 </body>
22 </html>
02
03 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
04
05 <html xmlns="http://www.w3.org/1999/xhtml">
06 <head runat="server">
07 <title>CustomValidatorTest</title>
08 </head>
09 <body>
10 <form id="form1" runat="server">
11 <div>
12
13 <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
14 <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="送出" />
15 <asp:CustomValidator ID="CustomValidator1" runat="server"
16 ControlToValidate="TextBox1" ErrorMessage="CustomValidator"
17 onservervalidate="CustomValidator1_ServerValidate" ValidateEmptyText="True"></asp:CustomValidator>
18
19 </div>
20 </form>
21 </body>
22 </html>
CustomValidatorTest.aspx.cs
01 
using System;
02
using System.Collections;
03 using System.Configuration;
04 using System.Data;
05 using System.Linq;
06 using System.Web;
07 using System.Web.Security;
08 using System.Web.UI;
09 using System.Web.UI.HtmlControls;
10 using System.Web.UI.WebControls;
11 using System.Web.UI.WebControls.WebParts;
12
using System.Xml.Linq;
13
14 public partial class CustomValidatorTest : System.Web.UI.Page
15 {
16
protected void Page_Load(object sender, EventArgs e)
17
{
18
19
}
20 protected void Button1_Click(object sender, EventArgs e)
21 {
22 if (CustomValidator1.IsValid)
23 {
24 Response.Write("送出成功!");
25 }
26 }
27 protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
28 {
29 DateTime dt;
30
31 if (string.IsNullOrEmpty(args.Value))
32 {
33 CustomValidator1.ErrorMessage = "該欄位必填";
34 args.IsValid = false;
35 }
36
37 else if (DateTime.TryParseExact(args.Value, "yyyy/MM/dd", null,System.Globalization.DateTimeStyles.AllowWhiteSpaces, out dt) == false)
38 {
39 CustomValidator1.ErrorMessage = "日期格式為 yyyy/MM/dd";
40 args.IsValid = false;
41 }
42 else
43 {
44 args.IsValid = true;
45 }
46 }
47 }
48
using System;
using 02
using System.Collections;03
using System.Configuration;04
using System.Data;05
using System.Linq;06
using System.Web;07
using System.Web.Security;08
using System.Web.UI;09
using System.Web.UI.HtmlControls;10
using System.Web.UI.WebControls;11
using System.Web.UI.WebControls.WebParts;12
using System.Xml.Linq;13
14
public partial class CustomValidatorTest : System.Web.UI.Page15
{16
protected void Page_Load(object sender, EventArgs e)17
{
18
19
}20
protected void Button1_Click(object sender, EventArgs e)21
{22
if (CustomValidator1.IsValid)23
{24
Response.Write("送出成功!");25
}26
}27
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)28
{29
DateTime dt;30
31 if (string.IsNullOrEmpty(args.Value))
32
{33
CustomValidator1.ErrorMessage = "該欄位必填";34
args.IsValid = false;35
}36
37 else if (DateTime.TryParseExact(args.Value, "yyyy/MM/dd", null,System.Globalization.DateTimeStyles.AllowWhiteSpaces, out dt) == false)
38
{39
CustomValidator1.ErrorMessage = "日期格式為 yyyy/MM/dd";40
args.IsValid = false;41
}42
else43
{44
args.IsValid = true;45
}46
}47
}48
執行結果：
