CODEWITHSUNDEEP
c#wpftextio
superninja9000
superninja9000

Reputation: 21

Fast output text for WPF control

In my project I need to output large list of string to control that is similiar to windows notepad. Right now Im using TextBox.

  for(int i = 0; i< result.Count;i++)
 {
     textbox.Text += result[i].ToString() + Environment.NewLine;
 }

If result count = 3000 then this loop lasts 13 second on my pc, this is definetely too slow, so what I should use(or how to configure Textbox?) for faster output?

Upvotes: 0

Views: 1398

Answers (1)

BradleyDotNET
BradleyDotNET

Reputation: 61379

To a certain extent you are always going to take a performance hit if you are enumerating a very large collection. However, you can avoid a lot of string concatenation (which is very slow and memory intensive), and along with it having to assign the control text every iteration of your loop by using built-in string creation methods before assignment. An easy way in this case would be String.Join

textbox.Text = String.Join(Environment.NewLine, result);

Using a StringBuilder would also be more efficient:

StringBuilder builder = new StringBuilder();
for(int i = 0; i< result.Count;i++)
{
     builder.AppendLine(result[i]);
}
textbox.Text = builder.ToString();

Upvotes: 3

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