how to define validation function globally

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hello guys,
sorry but i m new in C#....
can any buddy tell me how to define validation for text box like numbers only,char.only etc.... actually my problem is that i want to define these function.in such way ....i can call this function directly as i need in different-2 form ....

please can any buddy give me idea what i have to do......?

C# window application

Posted 13-Dec-11 20:55pm

Lakhan Aanjana

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Abhinav S · Accepted Answer · 2011-12-14T06:56:00

A number of Windows Forms validations techniques are discussed here[^].
Amongst them, Validation with the MaskedTextBox Control and Event Driven validation are more common approaches.

Have a look at the validating event as well[^].
Finally, here[^] is a very simple example to get you started.

**Orcun Iyigun** · Accepted Answer · 2011-12-13T21:03:00

Create a static class such as ReqFunctions. Make the methods as static and then you can call them from the form that you are working.

for example on top of my head:

C#

class ReqFunctions
{
  public static bool ValidateTextBox(string txtBoxValue, string validationType)
  {    
    if(validatioType == "Number")
    {
      Regex isnumber = new Regex("[^0-9]");
      return !isnumber.IsMatch(txtBoxValue);    
    }
    if(validationType == "Char")
    {
      Regex ischar = new Regex("^[a-zA-Z]+$");
      return !ischar.IsMatch(txtBoxValue);     
    }
  }
}

In your code you can call this function as

C#

ReqFunctions.ValidateTextBox(txtTextbox1.Text);

You can also check this MSDN link[^].
Recently I have found this also: Numbers and Characters only Textbox Validation in C# ![^]

how to define validation function globally

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