i have textbox only allow decimals and '+' it allow only 1 Decimal "12.332" i need to allow 1 decimal before '+' and 1 decimal after '+' Example i have 12.43+12.23 i can't type the 12(.) because i allow only 1 decimal i am using Split method to get 2 parts before and after
and it is my code
// checks to make sure only 1 decimal is allowed
if (e.KeyChar == 46)
{
if ((sender as TextBox).Text.IndexOf(e.KeyChar) != -1)
e.Handled = true;
}
And this is My method
if(textBox1.Text.Contains('+')==true )
{
string Value = textBox1.Text;
string[] tmp = Value.Split('+');
string FirstValu = tmp[1];
string SecValu = tmp[0];
}
how to use method with event to allow another decimal place after '+'
I would say use two text boxes like someone said in the comments but if you want to be stubborn here is a function to run inside an event that is called when the text changes in the text box.
void textbox_textChanged(object sender, EventArgs e)
{
string text = textBox.Text;
int pointCounter = 0;
int addCounter =0
string temp = "";
string numbers = "0123456789";
for(int i =0;i<text.Length;i++)
{
bool found = false;
for(int j = 0;j<numbers.Length;j++)
{
if(text[i]==numbers[j])
{
temp+=text[i];
found = true;
break;
}
}
if(!found)
{
if('.' == text[i])
{
if(pointCounter<1)
{
pointCounter++;
temp+=text[i];
}
}else
if('+' == text[i])
{
if(addCounter<1)
{
pointCounter=0;
addCounter++;
temp+=text[i];
}
}
}
}
textBox.text = temp;
}