C#

private void InsertThisStudent(Student std, List<Student> List)
     {

         for (int i = 0; i < List.Count; i++)
         {
             if (std.CompareTo(List[i]) < 0)
             {
                 List.Insert(i, std);
                 return;
             }
         }
         //If this is the last one
         List.Add(std);
     }

maheesh wrote:

But i want to invoke the API's through CMD

YourUserControlClass userCtrl = new YourUserControlClass();
userCtrl.myEvent += new EventHandler(this.myHandler); 
this.Controls.Add(userCtrl);

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            Regex r=new Regex(@"^\d+$");
            Match m=r.Match(textBox1.text);

            if(!m.Success) MessageBox.Show("Wrong input format");
        }

public class ExtTextBox:TextBox
{
 public string ValidationRegEx; //you shuld use get/set methods insted of setting the attribute as public, but I am lazy today.
}

....

//create the control
ExtTextBox newETB=new ExtTextBox();
...
...
newETB.ValidationRegex=@"^\d+$";
...
this.Controls.add(newETB);

//when user submits data
foreach(Control c in this.Controls)
{
 if(c is ExtTextBox)
 {
  ExtTextBox tmpC=(ExtTextBox)c;
  Regex r=new Regex(tmpC.ValidationRegex);
  Match m=r.Match(tmpc.Text);
  
  if(!m.Success)
  {
   //give feedback to user
  }
 }
}

khalil.kamel wrote:

Am trying to learn how to secure web application

CauseValidation = true;

dtGrdView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
	here e will provide you the data entered in the data grid view
	 if (e.ColumnIndex > 0)
 	{
		// write your validation here 
		// if not valid data
		e.Cancel = true;
	 }
}