Sep 01

ASP.Net Validation Control Examples in C# #.Net Web Applications

Brought from: http://salearningschool.com/displayArticle.php?table=Articles&articleID=1325&title=ASP.Net%20Validation%20Control%20Examples%20in%20C#.

ASP.Net Validation Control Examples. Just check the code below

Some notes

  • RequiredFieldValidator: is used to check that a field is filled up
  • CompareValidator: Compare the value of a field with another field or data
  • RangeValidator: Compares the data is within a given range
  • RegularExpressionValidator: Domain name syntax, email addtress syntax
  • ValidationSummary: Display all validation errors in a summary box
  • CompareValidator: Write your own custom validation rules and display the outcome
  • Remember
    • You can display error on the side of the control
    • You can display error under the control
    • The example used both just for example
    • The Text property is the output that comes just where the validation control is placed. ErrorMessage propert is for the ValidationSummary
    • If you just want the Validation Summary output, use Display=”none” for the validation control (not the summarycontrol) itself
  • the code can be seen at http://salearningschool.com/samples/validate.txt as well
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="validation.aspx.cs" 
Inherits="validation" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Validation Control</title>
</head>
<body>   


    <form id="form1" runat="server">
    <div>


        <asp:ValidationSummary ID="ValidationSummary1"
            HeaderText="Form Validation Summary"
            DisplayMode="BulletList"
            EnableClientScript="true"
             ForeColor = "Red"
            runat="server"
        />

        <asp:Label ID="lblFirstName" runat="server" Text="First Name:" 
        Width="120"></asp:Label>
        <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>

        <asp:RequiredFieldValidator ID="firstNameValidator"
             ControlToValidate="txtFirstName"
             ErrorMessage="First Name Required"
             InitialValue=""
             Text=""
             Display ="None"
             runat="server"/>

        <br />

        <asp:Label ID="lblLastName" runat="server" Text="Last Name" Width="120">
        </asp:Label>
        <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
        <br/>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1"
             ControlToValidate="txtLastName"
             ErrorMessage="Last Name Required"
             InitialValue=""
             Text="Last Name Required"            
             ForeColor="Red"
             runat="server"/>

         <br />

        <asp:Label ID="lblEmail" runat="server" Text="Email:" Width="120">
        </asp:Label>
        <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>

        <asp:RegularExpressionValidator ID="emailValidation" 
            runat="server" 
            ControlToValidate="txtEmail" 
            ErrorMessage="Invalid Fformat"              
            ValidationExpression="^([a-zA-Z][w.-]*[a-zA-Z0-9]@[a-zA-Z0-9][w.-]*[a-zA-Z0-9]
            .[a-zA-Z][a-zA-Z.]*[a-zA-Z]){1,70}$"
            ForeColor ="Red"            
         />
             
        <br />

        <asp:Label ID="lblPassword" runat="server" Text="Password" Width="120">
        </asp:Label>
        <asp:TextBox ID="txtPassword" runat="server" TextMode="Password">
        </asp:TextBox>
        <br />

        <asp:Label ID="lblPassword2" runat="server" Text="Re Enter Password" Width="120">
        </asp:Label>
        <asp:TextBox ID="txtPassword2" runat="server" TextMode="Password">
        </asp:TextBox>
        <br />

         <asp:CompareValidator ID="compareV" ControlToValidate="txtPassword" 
         ControlToCompare="txtPassword2" runat="server" Text="mismatchmatch" 
         ForeColor="Red" />

        <br />

        <asp:Button ID="btnSubmit" runat="server" OnClick="Button1_Click" Text="Submit" />

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

From: http://sitestree.com/?p=3729
Categories:.Net Web Applications
Tags:
Post Data:2016-07-16 11:12:48

    Shop Online: <a href='https://www.ShopForSoul.com/' target='new' rel="noopener">https://www.ShopForSoul.com/</a>
    (Big Data, Cloud, Security, Machine Learning): Courses: <a href='http://Training.SitesTree.com' target='new' rel="noopener"> http://Training.SitesTree.com</a> 
    In Bengali: <a href='http://Bangla.SaLearningSchool.com' target='new' rel="noopener">http://Bangla.SaLearningSchool.com</a>
    <a href='http://SitesTree.com' target='new' rel="noopener">http://SitesTree.com</a>
    8112223 Canada Inc./JustEtc: <a href='http://JustEtc.net' target='new' rel="noopener">http://JustEtc.net (Software/Web/Mobile/Big-Data/Machine Learning) </a>
    Shop Online: <a href='https://www.ShopForSoul.com'> https://www.ShopForSoul.com/</a>
    Medium: <a href='https://medium.com/@SayedAhmedCanada' target='new' rel="noopener"> https://medium.com/@SayedAhmedCanada </a>