Determine number of characters entered into textbo

问题:

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;

回答1:

How about

int jj = textBox1.Text.Length;

Or am I missing something?

回答2:

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

textBox1.Text.Length

回答3:

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

回答4:

you can use the OnTextChanged event of the Textbox on the client side in Javascript and compute the increment from.