Re: Insert only numbers in textbox

[KingSatan]

How can I Force the user to insert only numbers in a textbox?
is there a way to do this in c#?

[KingSatan]

i figured you could loop the the textbox.text and delete characters which arent numbers

but i dont know how to do this

so i tried something like this

string txtPriceRangeSpecialAddNewString;
		

private int checkdec()
		{ txtPriceRangeSpecialAddNewString=txtPriceRangeSpecialAddNew.Text.ToString();
			int x = 0;
			for(int i =0; i<txtPriceRangeSpecialAddNew.Text.Length; i++)
			{
			string CurrentChar = txtPriceRangeSpecialAddNewString.Substring(i,1);
				try
				{
				Convert.ToInt32(CurrentChar);
				}
				catch(System.FormatException ex)
				{
					if(CurrentChar == ".")
					{
					x++;
					}
				}
			}
			return x;
		}

and the method to delete the characters which arent numbers

private string DeleteChar()
		{txtPriceRangeSpecialAddNewString=txtPriceRangeSpecialAddNew.Text.ToString();
		for(int i=0 ; i<txtPriceRangeSpecialAddNew.Text.Length; i++)
			{
				string CurrentChar=txtPriceRangeSpecialAddNewString.Substring(1,i);
				try
				{
				Convert.ToInt32(CurrentChar);
				}
				catch(FormatException ex)
				{
					if(CurrentChar!=".")
					{
					txtPriceRangeSpecialAddNewString=txtPriceRangeSpecialAddNewString.Remove(i,1);
					i--;
					lblDGMIError.Text=ex.ToString();
					}
				}
			}
		return txtPriceRangeSpecialAddNewString;
		}
			void txtPriceRangeAddNew_TextChanged(object sender, System.EventArgs e)
			{	string pricerange = txtPriceRangeSpecialAddNewString;
				checkdec();
				DeleteChar();	
				
			}

the methods to run both methods

void txtPriceRangeSpecialAddNew_TextChanged(object sender, System.EventArgs e)
		{
				string pricerange = txtPriceRangeSpecialAddNewString;
			checkdec();
			DeleteChar();	
				
		}

but it gives me an error saying Index and length must refer to a location within the string. Parameter name: length

[Hack]

Split from this thread in ClassicVb.