string temp = textBox1.Text;
char[] array1 = temp.ToCharArray();
string temp2 = "" + array1[0];
string temp3 = "" + array1[1];
string temp4 = "" + array1[2];
textBox2.Text = temp2;
textBox3.Text = temp3;
textBox4.Text = temp4;
How do I prevent an IndexOutOfRange Error occurring when a user inputs less than three letters in textBox1?
How i will prevent IndexOutOfRange Error if a user only input less than three letters in the textBox1?
Just check that using temp.Length
:
if (temp.Length > 0)
{
...
}
... or use switch
/ case
.
Also, you don't need the array at all. Just call ToString
on each character, or use Substring
:
string temp = textBox1.Text;
switch (temp.Length)
{
case 0:
textBox2.Text = "";
textBox3.Text = "";
textBox4.Text = "";
break;
case 1:
// Via the indexer...
textBox2.Text = temp[0].ToString();
textBox3.Text = "";
textBox4.Text = "";
break;
case 2:
// Via Substring
textBox2.Text = temp.Substring(0, 1);
textBox3.Text = temp.Substring(1, 1);
textBox4.Text = "";
break;
default:
textBox2.Text = temp.Substring(0, 1);
textBox3.Text = temp.Substring(1, 1);
textBox4.Text = temp.Substring(2, 1);
break;
}
Another option - even neater - is to use the conditional operator:
string temp = textBox1.Text;
textBox2.Text = temp.Length < 1 ? "" : temp.Substring(0, 1);
textBox3.Text = temp.Length < 2 ? "" : temp.Substring(1, 1);
textBox4.Text = temp.Length < 3 ? "" : temp.Substring(2, 1);
Another way to do it is using ElementAtOrDefault
:
string[] temp = textBox1.Text.Select(c => c.ToString());
string temp2 = "" + temp.ElementAtOrDefault(0);
string temp3 = "" + temp.ElementAtOrDefault(1);
string temp4 = "" + temp.ElementAtOrDefault(2);
textBox2.Text = temp2;
textBox3.Text = temp3;
textBox3.Text = temp4;
A general solution to this kind of problem is to check the length of the source value (array, string, or vector) before accessing its elements. For example:
string temp = textBox1.Text;
if (temp.Length > 0)
textBox2.Text = temp.Substring(0, 1);
if (temp.Length > 1)
textBox3.Text = temp.Substring(1, 1);
if (temp.Length > 2)
textBox4.Text = temp.Substring(2, 1);
string temp = textBox1.Text; char[] array1 = temp.ToCharArray(); if(temp.length==3) { string temp2 = "" + array1[0]; string temp3 = "" + array1[1]; string temp4 = "" + array1[2]; textBox2.Text = temp2;
textBox3.Text = temp3; textBox3.Text = temp4; }string temp = textBox1.Text; char[] array1 = temp.ToCharArray(); if(temp.length==3) { string temp2 = "" + array1[0]; string temp3 = "" + array1[1]; string temp4 = "" + array1[2]; textBox2.Text = temp2;
this will be work if ur string length is 3....
textBox3.Text = temp3; textBox3.Text = temp4; }
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