Admin: 1 версия

2010-05-26T11:57:54Z

1 версия

Новая страница

== asp:CompareValidator, Type="String", Operator="NotEqual" and ErrorMessage==



<source lang="csharp">
<html><body>
<form runat="server">
<asp:Label id="lblMessage" runat="server" /><br>
<asp:Panel id="Panel1" runat="server">
<table>
<tr>
<td>
First and last name:
</td>
<td>
<asp:TextBox id="tbFName" runat="server" />
<asp:TextBox id="tbLName" runat="server" /><br>
<asp:RequiredFieldValidator runat="server"
ControlToValidate="tbFName"
ErrorMessage="First name required"/><br>
<asp:RequiredFieldValidator runat="server"
ControlToValidate="tbLName"
ErrorMessage="Last name required"/><br>
<asp:CompareValidator runat="server"
ControlToValidate="tbFName"
ControlToCompare="tbLName"
Type="String"
Operator="NotEqual"
ErrorMessage="First and last name cannot be the same" />
</td>
</tr>
<tr>
<td>
<asp:Button id="Submit" runat="server"
text="Add" />
</td>
</tr>
</table>
</asp:Panel>
</form>
</body></html></source>

== Check birthday==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Login" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Simple Login Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>

Username:<br />
<asp:TextBox id="usernameTextBox" runat="server" />
<asp:RequiredFieldValidator id="usernameReq"
runat="server"
ControlToValidate="usernameTextBox"
ErrorMessage="Username is required!"
SetFocusOnError="True" />

Password and Confirmation:<br />
<asp:TextBox id="passwordTextBox"
runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="passwordReq"
runat="server"
ControlToValidate="passwordTextBox"
ErrorMessage="Password is required!"
SetFocusOnError="True"
Display="Dynamic" />
<asp:TextBox id="confirmPasswordTextBox" runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="confirmPasswordReq"
runat="server" ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Password confirmation is required!"
SetFocusOnError="True" Display="Dynamic" />
<asp:CompareValidator id="comparePasswords" runat="server"
ControlToCompare="passwordTextBox"
ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Your passwords do not match up!"
Display="Dynamic" />

Birth Date:<br />
<asp:TextBox id="birthDateTextBox" runat="server" />
<asp:CompareValidator id="birthDateCheck" runat="server"
Operator="DataTypeCheck" Type="Date"
ControlToValidate="birthDateTextBox"
ErrorMessage="You must enter the date in a valid format!"
SetFocusOnError="True"
Display="Dynamic" />

<asp:Button id="submitButton" runat="server"
Text="Submit" OnClick="submitButton_Click" />

</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Login : System.Web.UI.Page
{
protected void submitButton_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
submitButton.Text = "Valid";
}
else
{
submitButton.Text = "Invalid!";
}
}
}</source>

== CompareValidator compares the value of one form field against another form field.==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Compare Values</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblStartDate"
Text="Start Date:"
Runat="server" />
<asp:TextBox
id="txtStartDate"
Runat="server" />
<br /><br />
<asp:Label
id="lblEndDate"
Text="End Date:"
Runat="server" />
<asp:TextBox
id="txtEndDate"
Runat="server" />
<asp:CompareValidator
id="cmpDate"
Text="(End date must be greater than start date)"
ControlToValidate="txtEndDate"
ControlToCompare="txtStartDate"
Type="Date"
Operator="GreaterThan"
Runat="server" />
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />
</div>
</form>
</body>
</html></source>

== CompareValidator for number, text and password==



<source lang="csharp">
<%@ Page Language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Using CompareValidator Control</title>
</head>
<body>
<form id="form1" runat="server">
<div>

Age:<br />
<asp:TextBox ID="txtAge" runat="server"></asp:TextBox>
<asp:CompareValidator ID="compAge" runat="server"
ControlToValidate="txtAge"
ValueToCompare="18"
Operator="LessThanEqual"
SetFocusOnError="true"
Text="You are too old to view this site" />

Sales Date:<br />
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
<asp:CompareValidator ID="compDate" runat="server"
ControlToValidate="txtDate"
Operator="DataTypeCheck"
Type="Date"
Text="Enter a valid date" />

Quantity:<br />
<asp:TextBox ID="txtQuantity" runat="server"></asp:TextBox>
<asp:CompareValidator ID="compQuantity" runat="server"
ControlToValidate="txtQuantity"
Operator="DataTypeCheck"
Type="Integer"
Text="Enter a valid whole number" />

Enter Password:<br />
<asp:TextBox ID="txtPass1" runat="server" TextMode="password"></asp:TextBox>

Reenter Password:<br />
<asp:TextBox ID="txtPass2" runat="server" TextMode="password"></asp:TextBox>

<asp:CompareValidator ID="compPass" runat="server"
ControlToValidate="txtPass2"
Operator="Equal"
ControlToCompare="txtPass1"
Text="Passwords must match" />

<asp:Button ID="btnSubmit" Text="Click this to test validation" runat="server" />

</div>
</form>
</body>
</html></source>

== CompareValidator performs a comparison against a fixed value.==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Load()
{
cmpDate.ValueToCompare = DateTime.Now.ToString("d");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Fixed Value</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblDate"
Text="Date:"
AssociatedControlID="txtDate"
Runat="server" />
<asp:TextBox
id="txtDate"
Runat="server" />
<asp:CompareValidator
id="cmpDate"
Text="(Date must be greater than now)"
ControlToValidate="txtDate"
Type="Date"
Operator="GreaterThan"
Runat="server" />
<br /><br />
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />
</div>
</form>
</body>
</html></source>

== CompareValidator performs three different types of validations==



<source lang="csharp">
A data type check
Compare the value against a fixed value
Compare the value against another

Important properties
ControlToValidate: The ID of the form field being validated.
Text: The error message.
Type: The type of value being compared.
Possible values are String, Integer, Double, Date, and Currency.
Operator: The type of comparison to perform.
Possible values are DataTypeCheck, Equal, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual, and NotEqual.
ValueToCompare: The fixed value.
ControlToCompare: The ID of a control against which to compare.

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Data Type Check</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblBirthDate"
Text="Birth Date:"
AssociatedControlID="txtBirthDate"
Runat="server" />
<asp:TextBox
id="txtBirthDate"
Runat="server" />
<asp:CompareValidator
id="cmpBirthDate"
Text="(Invalid Date)"
ControlToValidate="txtBirthDate"
Type="Date"
Operator="DataTypeCheck"
Runat="server" />
<br /><br />
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />
</div>
</form>
</body>
</html></source>

== CompareValidator with age field==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Login" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Simple Login Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>

Username:<br />
<asp:TextBox id="usernameTextBox" runat="server" />
<asp:RequiredFieldValidator id="usernameReq"
runat="server"
ControlToValidate="usernameTextBox"
ErrorMessage="Username is required!"
SetFocusOnError="True" />

Password and Confirmation:<br />
<asp:TextBox id="passwordTextBox" runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="passwordReq"
runat="server"
ControlToValidate="passwordTextBox"
ErrorMessage="Password is required!"
SetFocusOnError="True" Display="Dynamic" />
<asp:TextBox id="confirmPasswordTextBox" runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="confirmPasswordReq"
runat="server"
ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Password confirmation is required!"
SetFocusOnError="True"
Display="Dynamic" />
<asp:CompareValidator id="comparePasswords" runat="server"
ControlToCompare="passwordTextBox"
ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Your passwords do not match up!"
Display="Dynamic" />



Age:<br />
<asp:TextBox id="ageTextBox" runat="server" />
<asp:RequiredFieldValidator id="ageReq" runat="server"
ControlToValidate="ageTextBox"
ErrorMessage="Age is required!"
SetFocusOnError="True" Display="Dynamic" />
<asp:CompareValidator id="ageCheck" runat="server"
Operator="GreaterThan"
Type="Integer"
ControlToValidate="ageTextBox"
ValueToCompare="15"
ErrorMessage="You must be 16 years or older to log in" />

<asp:Button id="submitButton" runat="server"
Text="Submit"
OnClick="submitButton_Click" />

</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Login : System.Web.UI.Page
{
protected void submitButton_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
submitButton.Text = "Valid";
}
else
{
submitButton.Text = "Invalid!";
}
}
}</source>

== Disable Client Validation==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="DisableClientValidation" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">

Quantity:<br />
<asp:TextBox ID="txtQuantity" runat="server"></asp:TextBox>
<asp:CompareValidator ID="compQuantity"
runat="server"
ControlToValidate="txtQuantity"
Operator="DataTypeCheck"
Type="Integer"
EnableClientScript="false"
Text="Enter a valid whole number" />

<asp:Button ID="btnSubmit" Text="Click this to test validation" runat="server" OnClick="btnSubmit_Click" />

<asp:Label ID="labContent" runat="server" />
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class DisableClientValidation : System.Web.UI.Page
{
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (IsValid)
{
int quantity = Convert.ToInt32(txtQuantity.Text);
int unitCost = 5;
int price = quantity * unitCost;
labContent.Text = "Price for order is $" + price;
}
}
}</source>

== Making comparisons with the CompareValidator control==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Label1.Text = "Passwords match"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>CompareFieldValidator</title>
</head>
<body>
<form id="Form1" runat="server">
Age:
<asp:TextBox ID="TextBox1" Runat="server"></asp:TextBox>
 
<asp:CompareValidator ID="CompareValidator1"
Runat="server"
Operator="GreaterThan"
ValueToCompare="18"
ControlToValidate="TextBox1"
ErrorMessage="You must be older than 18 to join"
Type="Integer">
</asp:CompareValidator>

<asp:Button ID="Button1" OnClick="Button1_Click"
Runat="server" Text="Login"></asp:Button>

<asp:Label ID="Label1" Runat="server"></asp:Label>

</form>
</body>
</html></source>

== Set DeleteParameters, InsertParameters and UpdateParameters for asp:SqlDataSource==



<source lang="csharp">
<%@ Page Language="VB" AutoEventWireup="false"%>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
DeleteCommand="DELETE FROM [Books] WHERE [BookID] = @BookID"
InsertCommand="INSERT INTO [Books] ([Title], [Author], [YearPublished], [Price], [LastReadOn], [PageCount]) VALUES (@Title, @Author, @YearPublished, @Price, @LastReadOn, @PageCount)"
SelectCommand="SELECT * FROM [Books]"
UpdateCommand="UPDATE [Books] SET [Title] = @Title, [Author] = @Author, [YearPublished] = @YearPublished, [Price] = @Price, [LastReadOn] = @LastReadOn, [PageCount] = @PageCount WHERE [BookID] = @BookID">
<DeleteParameters>
<asp:Parameter Name="BookID" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Author" Type="String" />
<asp:Parameter Name="YearPublished" Type="Int32" />
<asp:Parameter Name="Price" Type="Decimal" />
<asp:Parameter Name="LastReadOn" Type="DateTime" />
<asp:Parameter Name="PageCount" Type="Int32" />
<asp:Parameter Name="BookID" Type="Int32" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Author" Type="String" />
<asp:Parameter Name="YearPublished" Type="Int32" />
<asp:Parameter Name="Price" Type="Decimal" />
<asp:Parameter Name="LastReadOn" Type="DateTime" />
<asp:Parameter Name="PageCount" Type="Int32" />
</InsertParameters>
</asp:SqlDataSource>

</div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White"
DataSourceID="SqlDataSource1">
<FooterStyle BackColor="#CCCC99" />
<Columns>
<asp:CommandField ShowDeleteButton="True" ButtonType="Button" DeleteText="Delete Book" />
<asp:BoundField DataField="BookID" HeaderText="BookID" InsertVisible="False" ReadOnly="True"
SortExpression="BookID" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="Author" HeaderText="Author" SortExpression="Author" />
<asp:BoundField DataField="YearPublished" HeaderText="YearPublished" SortExpression="YearPublished" />
<asp:BoundField DataField="Price" HeaderText="Price" SortExpression="Price" />
<asp:BoundField DataField="LastReadOn" HeaderText="LastReadOn" SortExpression="LastReadOn" />
<asp:BoundField DataField="PageCount" HeaderText="PageCount" SortExpression="PageCount" />
</Columns>
<RowStyle BackColor="#F7F7DE" />
<SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
<HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</form>
</body>
</html>
File: Web.config
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="ConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\MyFirstDatabase.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration></source>

== To specify the data types: Currency, Date, Double, Integer, String==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Label1.Text = "Passwords match"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>CompareFieldValidator</title>
</head>
<body>
<form id="Form1" runat="server">
Age:
<asp:TextBox ID="TextBox1" Runat="server" MaxLength="3"/>
<asp:CompareValidator ID="CompareValidator1"
Runat="server"
ErrorMessage="You must enter a number"
ControlToValidate="TextBox1"
Type="Integer"
Operator="DataTypeCheck"/>

<asp:Button ID="Button1" OnClick="Button1_Click"
Runat="server" Text="Login"></asp:Button>

<asp:Label ID="Label1" Runat="server"></asp:Label>

</form>
</body>
</html></source>

== Use CompareValidator to check password field and confirm password field==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Login" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Simple Login Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>

Username:<br />
<asp:TextBox id="usernameTextBox" runat="server" />
<asp:RequiredFieldValidator id="usernameReq"
runat="server"
ControlToValidate="usernameTextBox"
ErrorMessage="Username is required!"
SetFocusOnError="True" />

Password and Confirmation:<br />
<asp:TextBox id="passwordTextBox" runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="passwordReq"
runat="server"
ControlToValidate="passwordTextBox"
ErrorMessage="Password is required!"
SetFocusOnError="True" Display="Dynamic" />
<asp:TextBox id="confirmPasswordTextBox" runat="server"
TextMode="Password" />
<asp:RequiredFieldValidator id="confirmPasswordReq"
runat="server"
ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Password confirmation is required!"
SetFocusOnError="True"
Display="Dynamic" />
<asp:CompareValidator id="comparePasswords"
runat="server"
ControlToCompare="passwordTextBox"
ControlToValidate="confirmPasswordTextBox"
ErrorMessage="Your passwords do not match up!"
Display="Dynamic" />

<asp:Button id="submitButton"
runat="server"
Text="Submit"
OnClick="submitButton_Click" />

</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Login : System.Web.UI.Page
{
protected void submitButton_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
submitButton.Text = "Valid";
}
else
{
submitButton.Text = "Invalid!";
}
}
}</source>

== Using the CompareValidator to test values against other control values==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Label1.Text = "Passwords match"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>CompareFieldValidator</title>
</head>
<body>
<form id="Form1" runat="server">

Password<br>
<asp:TextBox ID="TextBox1" Runat="server"
TextMode="Password"></asp:TextBox>
 
<asp:CompareValidator ID="CompareValidator1"
Runat="server" ErrorMessage="Passwords do not match!"
ControlToValidate="TextBox2"
ControlToCompare="TextBox1"></asp:CompareValidator>

Confirm Password<br>
<asp:TextBox ID="TextBox2" Runat="server"
TextMode="Password"></asp:TextBox>

<asp:Button ID="Button1" OnClick="Button1_Click"
Runat="server" Text="Login"></asp:Button>

<asp:Label ID="Label1" Runat="server"></asp:Label>

</form>
</body>
</html></source>

== Using the CompareValidator to validate against constants==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Button1_Click(sender As Object, e As EventArgs)
Label1.Text = "Passwords match"
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>CompareFieldValidator</title>
</head>
<body>
<form id="Form1" runat="server">
Age:
<asp:TextBox ID="TextBox1" Runat="server" MaxLength="3">
</asp:TextBox>
<asp:CompareValidator ID="CompareValidator1"
Runat="server"
ErrorMessage="You must enter a number"
ControlToValidate="TextBox1"
Type="Integer"
Operator="DataTypeCheck"/>

<asp:Button ID="Button1" OnClick="Button1_Click"
Runat="server" Text="Login"></asp:Button>

<asp:Label ID="Label1" Runat="server"></asp:Label>

</form>
</body>
</html></source>

== What happens to asp:CompareValidator in the client side==



<source lang="csharp">
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="MyPage" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
Total number of children:
<asp:TextBox ID="totalChildren" runat="server" Columns="4"></asp:TextBox>
<asp:CompareValidator ID="CompareValidator1" runat="server" ControlToValidate="totalChildren"
ErrorMessage="The total number of children must be a whole number greater than or equal to 0"
Operator="GreaterThanEqual" Type="Integer" ValueToCompare="0"></asp:CompareValidator><br />
<br />
<asp:Button ID="btnSubmit" runat="server" Text="Click Me" />
<br />
<br />
<asp:Label ID="results" runat="server"></asp:Label></div>
</form>
</body>
</html>
File: Default.aspx.vb

Partial Class MyPage
Inherits System.Web.UI.Page
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
If Page.IsValid Then
results.Text = "Input is valid..."
Else
results.Text = "Input is <b>not</b> valid..."
End If
End Sub
End Class</source>

ASP.NET Tutorial/Validation/CompareValidator - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия

← Предыдущая	Версия 15:30, 26 мая 2010
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