How to counting characters in C# ?

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Hi all,
Please let me know, the case is

i have a text field which contains 20 characters, i have split it again as 14+6 by using substring method which is store in two different fields in database table.
Problem is now when i pass less that 14 or less than 6 characters in text fields it gives length exception, because in substring it demanded for 14 and 6 length respectively.

i need to know how can i pass less than 14 and less than 6 value in text field.

What I have tried:

string fullname = Name_txt.Text;
string val2 = fullname.Substring(0, 14); //validity
string val3 = fullname.Substring(14,6);

now for substring (val2) 1 14 is fixed if i go for entering 13 character it will throw exception and same if i go to enter less than6 charcacter then it will give exception of length count as well

Posted 18-Jan-18 20:03pm

ANKIT JOHRI

Updated 18-Jan-18 20:15pm

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Karthik_Mahalingam · Answer 1 · 2018-01-18T20:15:00

Solution 2

just validate the length of the text

string fullname = Name_txt.Text;
      string val2, val3;
      if (fullname.Length >= 20)
      {
          val2 = fullname.Substring(0, 14);
          val3 = fullname.Substring(14, 6);
      }
      else {
          // show validation message to the user to enter 20+ characters
      }

Posted 18-Jan-18 20:15pm

Karthik_Mahalingam

Comments

ANKIT JOHRI 19-Jan-18 2:26am

No name can be from 2 to 20 characters long... so substring need to accept first substring shoudl take 2 to 14 characters ( 14 or less than 14) and then substring 2 should take 15th to 20th(5 or less than 5)

Karthik_Mahalingam 19-Jan-18 2:41am

try

   string fullname =   "Name_txt.Text";
        string val2, val3;
         
        if (fullname.Length <= 14)
            val2 = fullname.Substring(0, fullname.Length); 
        else
        {
            val2 = fullname.Substring(0, 14);
            if (fullname.Length <= 20)
                val3 = fullname.Substring(14, fullname.Length - 14);
            else
                val3 = fullname.Substring(14, 6);
        }

ANKIT JOHRI 19-Jan-18 4:02am

i did this way now string fullname = Name_txt.Text;
string val2 = "";
string val3 = "";
if (fullname.Length >= 14)
{
val2 = fullname.Substring(0, 14); //name
val3 = fullname.Substring(14);
}
else
{
val2 = fullname; //name
//val3 = fullname.Substring(14, 6);

}

Karthik_Mahalingam 19-Jan-18 4:43am

it wont work if the text is more than 20, the second string will the remaining chars.

RickZeeland · Answer 2 · 2018-01-18T20:10:00

Solution 1

I think it would be a lot easier if you used two textboxes, one for the first name and one for the last name.
Another idea is to use a separator between first and last name, e.g. a hyphen, and then use the Split() function.

Posted 18-Jan-18 20:10pm

RickZeeland

Comments

ANKIT JOHRI 19-Jan-18 2:24am

sir that is mandatory to take one and split and name total can be 20 characters long but in substring it should include in first string from 0 to 14 and then in second substring from 15 to 20.

Alex Schunk 19-Jan-18 9:51am

Sounds fishy... Also a very bad design... John Stone for instance has to write his name this way? "John_________Stone"
But well... If you need it... Here:

var fullname = (Name_txt.Text ?? "").PadRight(20, ' ');
var val2 = fullname.Substring(0, 14); //validity
var val3 = fullname.Substring(14,6);