Determine number of characters entered into textbox with C#

Question

Hi I was wanting to display the number of characters entered into a textbox and I want it to update as I type how can I go about this?

Here is what I have:

int kk = textBox1.MaxLength;
int jj = //This is what I need to know.
string lol = jj.ToString() + "/" + kk.ToString();
label2.Text = lol;

Solution 1

How about

int jj = textBox1.Text.Length;

Or am I missing something?

Solution 2

The text of the text box will be a string, so it has a Length property, i.e.:

textBox1.Text.Length

Solution 3

TextBoxobject.Text.Length will give you the length of textbox value.

Comments

[Stuart Golodetz]

I'd have thought. Jon Skeet seems to think so too, and he's a man who knows stuff! (so if I'm wrong, I'm in good company :))

[Stuart Golodetz]

If you want a reference: msdn.microsoft.com/en-us/library/system.string.length.aspx

[Jon Skeet]

@John_Dong: Well it's a matter of thinking one step removed - you want to know the number of characters in the text of the text box, so you need to know a) how to get the number of characters in a string, and b) the value of a textbox as a string.

[John_Dong]

Do you by any chance also know how to read bytes from a file from a min and max hex offset and convert it to a string?

[John_Dong]

That's what I did but I set the test on load to "0/1020" and then it changes the min value every time the text gets changed.

[Jon Skeet]

@John_Dong: Open a stream (e.g. File.Open). Seek using the Position property. Read the data you want, looping round and using the result of Stream.Read each time. Use Encoding to convert the bytes into text.