baban jamal baban jamal - 1 month ago 5
C# Question

How to limit the textbox input charachters count?

When I get my specific data from a

DataGridView
and I want to put it in
TextBox
, I want the
TextBox
to just accept 11 characters, not more.

How do I achieve that?

textBox3.MaxLength = 11;
textBox3.Text= dataGridView1.CurrentRow.Cells["Phone Number"].Value.ToString();

Answer

Use SubString to truncate the string.

// Set the MaxLength, may not be needed if the field cannot be altered manually
textBox3.MaxLength = 11;

// Get the text value
var text = dataGridView1.CurrentRow.Cells["Phone Number"].Value.ToString();

// Starting from the first character, take up to 11 characters max
textBox3.Text = text.Substring(0, text.Length > 11 ? 11 : text.Length);

Example:

string longString = "abcdefghijklmnop";
string shortString = "abcde";

Result:

longString would show abcdefghijk
shortString would show abcde

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