how to set textbox should accept (minimum 50 words) using validation control .

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i have text box in that user has to enter description. In that text box user enter text should not be less than 50 character.if it is less than it show error that "Description shouldn't be less than 50 characters". In text box user can enter max value in text box beacuse i m set column property max in database.so there will be no limit.

Posted 4-Apr-13 3:18am

Manohar Khillare

Updated 4-Apr-13 3:19am

v2

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Anuja Pawar Indore 4-Apr-13 10:22am

Use Maxlength property of textbox

Prathap Gangireddy 4-Apr-13 14:24pm

Try to find the length of the text entered in the textbox when the control leaves the textbox i.e. Textbox leave event and show popup using Javascript.

2 solutions

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Shailesh Kalasariya · Answer 1 · 2013-04-04T03:22:00

Solution 1

C#

<asp:textbox id="TextBox2" runat="server" xmlns:asp="#unknown">
<asp:regularexpressionvalidator display="Dynamic" controltovalidate="TextBox2" id="RegularExpressionValidator2" validationexpression="^[\s\S]{50,}$" runat="server" errormessage="Minimum 50 characters required." xmlns:asp="#unknown">

Posted 4-Apr-13 3:22am

Shailesh Kalasariya

Updated 4-Apr-13 4:21am

v3

Rakesh Meel · Answer 2 · 2013-04-04T03:22:00

C#

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace skmExtendedValidators
{
   [ToolboxData("<{0}:TextBoxLengthValidator runat=server
         ErrorMessage=\"TextBoxLengthValidator\"></{0}:TextBoxLengthValidator>")]
   public class TextBoxLengthValidator : BaseCompareValidator
   {

      // Properties
      [Bindable(true),
       Description("TextBoxLengthValidator_MaximumLength"),
       Category("Behavior"),
       DefaultValue(-1)]
      public int MaximumLength
      {
         get
         {
            object MaxLengthVS = this.ViewState["MaximumLength"];
            if (MaxLengthVS != null)
            {
               return (int) MaxLengthVS;
            }
            return -1;
         }
         set
         {
            this.ViewState["MaximumLength"] = value;
         }
      }

      protected override bool EvaluateIsValid()
      {
         if (this.MaximumLength < 0)
            return true;

         string ControlToValidateName =
             base.GetControlValidationValue(base.ControlToValidate);

         return ControlToValidateName.Length <=
                   System.Convert.ToInt32(this.MaximumLength);
      }

      ...
   }
}