ASP.NET Tutorial/Validation/RangeValidator
Содержание
- 1 asp:RangeValidator is converted to JavaScript code after loading in client side
- 2 Birthday range
- 3 Manual Validation
- 4 RangeValidator checks whether the value falls between a minimum and maximum value
- 5 RangeValidator for number and date
- 6 Set Minimum/Maximum Value, ErrorMessage, ControlToValidate, EnableClientScript for asp:RangeValidator (C#)
- 7 Use asp:RangeValidator to check the value range in an asp:textbox
- 8 Using the RangeValidator control to test an integer value
- 9 Using the RangeValidator control to test a string date value (C#)
- 10 Using the RangeValidator control to test a string date value (VB.net)
asp:RangeValidator is converted to JavaScript code after loading in client side
<%@ 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>
Your age:
<asp:TextBox ID="age" runat="server" Columns="4"></asp:TextBox>
<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="age" ErrorMessage="Age must be between 0 and 150"
MaximumValue="150" MinimumValue="0" Type="Integer"></asp:RangeValidator><br />
<asp:Button ID="btnSubmit" runat="server" Text="Click Me" />
<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
Birthday range
<%@ 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 -->
Username:<br />
<asp:TextBox id="usernameTextBox" runat="server" />
<asp:RequiredFieldValidator id="usernameReq"
runat="server"
ControlToValidate="usernameTextBox"
ErrorMessage="Username is required!"
SetFocusOnError="True" />
<!-- Password -->
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 -->
Birth Date:<br />
<asp:TextBox id="birthDateTextBox" runat="server" />
<asp:RangeValidator id="birthDateRangeTest" runat="server"
Type="Date" ControlToValidate="birthDateTextBox"
MinimumValue="1/1/1970"
MaximumValue="12/31/1979"
ErrorMessage="You must"ve been born in the 1970s!" />
<!-- Submit Button -->
<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!";
}
}
}
Manual Validation
File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ManualValidation" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Manual Validation</title>
</head>
<body>
<form id="form1" runat="server">
<div>
A number (1 to 10):
<asp:TextBox id="txtValidated" runat="server"></asp:TextBox>
<asp:RangeValidator id="RangeValidator"
runat="server"
ErrorMessage="This Number Is Not In The Range"
ControlToValidate="txtValidated"
MaximumValue="10"
MinimumValue="1"
Type="Integer"
EnableClientScript="False"></asp:RangeValidator><br/>
<br />
Not validated:
<asp:TextBox id="txtNotValidated" runat="server"></asp:TextBox><br/>
<br />
<br />
<asp:Button id="cmdOK" runat="server" Text="OK" OnClick="cmdOK_Click" Width="36px"></asp:Button><br />
<br />
<asp:Label id="lblMessage" runat="server" EnableViewState="False"></asp:Label>
</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 ManualValidation : System.Web.UI.Page
{
protected void cmdOK_Click(object sender, EventArgs e)
{
string errorMessage = "<b>Mistakes found:</b><br />";
bool pageIsValid = true;
foreach (BaseValidator ctrl in this.Validators)
{
if (!ctrl.IsValid)
{
pageIsValid = false;
errorMessage += ctrl.ErrorMessage + "<br />";
TextBox ctrlInput = (TextBox)this.FindControl(ctrl.ControlToValidate);
errorMessage += " * Failed: ";
errorMessage += ctrlInput.Text + "<br />";
}
}
if (!pageIsValid) lblMessage.Text = errorMessage;
}
}
RangeValidator checks whether the value falls between a minimum and maximum value
You must set five properties when using this control:
ControlToValidate: The ID of the form field being validated.
Text: The error message.
MinimumValue: The minimum value.
MaximumValue: The maximum value.
Type: The type of comparison.
Possible values are String, Integer, Double, Date, and Currency.
<%@ 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 RangeValidator</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblAge"
Text="Age:"
AssociatedControlID="txtAge"
Runat="server" />
<asp:TextBox
id="txtAge"
Runat="server" />
<asp:RangeValidator
id="reqAge"
ControlToValidate="txtAge"
Text="(Invalid Age)"
MinimumValue="5"
MaximumValue="100"
Type="Integer"
Runat="server" />
<asp:Button
id="btnSubmit"
Text="Submit"
Runat="server" />
</div>
</form>
</body>
</html>
RangeValidator for number and date
<%@ 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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
Enter a number between 1 and 20:<br />
<asp:TextBox ID="txtNumber" runat="server"></asp:TextBox>
<asp:RangeValidator ID="rangeNum" runat="server"
ControlToValidate="txtNumber"
MinimumValue="1"
MaximumValue="20"
Type="Integer"
SetFocusOnError="true"
Text="Please enter number between 1 and 20" />
Enter a valid date from 2006:<br />
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
<asp:RangeValidator ID="rangeDate" runat="server"
ControlToValidate="txtDate"
CultureInvariantValues="true"
MinimumValue="2006/01/01"
MaximumValue="2006/12/31"
Type="Date"
SetFocusOnError="true"
Text="Please enter a valid date from 2006" />
<asp:Button ID="btnSubmit" Text="Click this to test validation" runat="server" />
</div>
</form>
</body>
</html>
Set Minimum/Maximum Value, ErrorMessage, ControlToValidate, EnableClientScript for asp:RangeValidator (C#)
File: Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="ValidationTest" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Validation Test</title>
</head>
<body>
<form id="form1" runat="server">
<div>
A number (1 to 10):
<asp:TextBox id="txtValidated" runat="server"></asp:TextBox>
<asp:RangeValidator id="RangeValidator"
runat="server"
ErrorMessage="This Number Is Not In The Range"
ControlToValidate="txtValidated"
MaximumValue="10"
MinimumValue="1"
Type="Integer"
EnableClientScript="False"></asp:RangeValidator>
Not validated:
<asp:TextBox id="txtNotValidated" runat="server"></asp:TextBox><br />
<asp:Button id="cmdOK"
runat="server"
Text="OK"
OnClick="cmdOK_Click"
Width="46px"></asp:Button><br />
<asp:Label id="lblMessage"
runat="server"
EnableViewState="False"
Font-Bold="True"
ForeColor="Red"></asp:Label>
</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 ValidationTest : System.Web.UI.Page
{
protected void cmdOK_Click(object sender, EventArgs e)
{
if (!Page.IsValid) return;
lblMessage.Text = "cmdOK_Click event handler executed.";
}
}
Use asp:RangeValidator to check the value range in an asp:textbox
<html><body>
<form runat="server">
<asp:Label id="lblMessage" runat="server" /><br>
<asp:Panel id="Panel1" runat="server">
<table>
<tr>
<td valign="top">City, State, ZIP (5-digit):</td>
<td valign="top">
<asp:TextBox id="tbCity"
runat="server" />,
<asp:TextBox id="tbState" runat="server" size=2 />
<asp:TextBox id="tbZIP" runat="server" size=5 /><br>
<asp:RegularExpressionValidator runat="server"
ControlToValidate="tbZIP"
ValidationExpression="[0-9]{5}"
ErrorMessage="That is not a valid ZIP" /><br>
<asp:RangeValidator runat="server"
ControlToValidate="tbZIP"
MinimumValue="00000"
MaximumValue="22222"
Type="String"
ErrorMessage="You don"t live in the correct region" />
</td>
</tr>
<tr>
<td colspan="2" valign="top" align="right">
<asp:Button id="Submit" runat="server"
text="Add" />
</td>
</tr>
</table>
</asp:Panel>
</form>
</body></html>
Using the RangeValidator control to test an integer value
<%@ 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:RangeValidator ID="RangeValidator1"
Runat="server"
ControlToValidate="TextBox1"
Type="Integer"
ErrorMessage="You must be between 30 and 40"
MaximumValue="40"
MinimumValue="30"></asp:RangeValidator>
<asp:Button ID="Button1" OnClick="Button1_Click"
Runat="server" Text="Login"></asp:Button>
<asp:Label ID="Label1" Runat="server"></asp:Label>
</form>
</body>
</html>
Using the RangeValidator control to test a string date value (C#)
<%@ Page Language="C#" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
RangeValidator1.MinimumValue = DateTime.Now.ToShortDateString();
RangeValidator1.MaximumValue = DateTime.Now.AddDays(14).ToShortDateString();
}
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
TextBox1.Text = Calendar1.SelectedDate.ToShortDateString();
}
protected void Button1_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
Label1.Text = "You are set to arrive on: " + TextBox1.Text.ToString();
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Date Validation Check</title>
</head>
<body>
<form id="form1" runat="server">
Arrival Date:
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RangeValidator ID="RangeValidator1"
runat="server"
ErrorMessage="select a date within the next two weeks."
ControlToValidate="TextBox1" Type="Date"></asp:RangeValidator><br />
<br />
Select your arrival date:<br />
<asp:Calendar ID="Calendar1"
runat="server"
OnSelectionChanged="Calendar1_SelectionChanged"></asp:Calendar>
<asp:Button ID="Button1" runat="server" Text="Button"
OnClick="Button1_Click" />
<br />
<asp:Label ID="Label1" runat="server"></asp:Label>
</form>
</body>
</html>
Using the RangeValidator control to test a string date value (VB.net)
<%@ Page Language="VB" %>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
RangeValidator1.MinimumValue = DateTime.Now.ToShortDateString()
RangeValidator1.MaximumValue = DateTime.Now.AddDays(14).ToShortDateString()
End Sub
Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, _
ByVal e As System.EventArgs)
TextBox1.Text = Calendar1.SelectedDate.ToShortDateString()
End Sub
Protected Sub Button1_Click(ByVal sender As Object, _
ByVal e As System.EventArgs)
If Page.IsValid Then
Label1.Text = "You are set to arrive on: " & TextBox1.Text
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Date Validation Check</title>
</head>
<body>
<form id="form1" runat="server">
Arrival Date:
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RangeValidator ID="RangeValidator1" runat="server"
ErrorMessage="select a date within the next two weeks."
ControlToValidate="TextBox1"
Type="Date"/>
<br />
Select your arrival date:<br />
<asp:Calendar ID="Calendar1"
runat="server"
OnSelectionChanged="Calendar1_SelectionChanged"></asp:Calendar>
<br />
<asp:Button ID="Button1"
runat="server"
Text="Button"
OnClick="Button1_Click" />
<br />
<asp:Label ID="Label1" runat="server"></asp:Label>
</form>
</body>
</html>