CODEWITHSUNDEEP
c#c#-4.0
aliprogrammer
aliprogrammer

Reputation: 197

SelectAll Textbox Text

I am using these following code. I want to when I select all text in the textbox it tells me but I don't know why it's not working. please give me some help. Please give some code so that I can use this when I select all text in the textbox text it tells me

if (textBox1.SelectAll() == true)
        {
            MessageBox.Show("You have selected all text in the textbox");
        }

It will tell me: Operator == cannot be applied to operands of type void and bool

Upvotes: 1

Views: 1735

Answers (6)

user8099567
user8099567

Reputation:

I think you should use the GotMouseCapture Event Here the code it works fine for me.

 private void textBox_GotMouseCapture(object sender, MouseEventArgs e)
    {
        textBox.SelectAll();
        textBox.Focus();
    }

Upvotes: 0

user1208484
user1208484

Reputation: 110

if(textBox1.SelectedText==textBox1.Text)
{
}

Upvotes: 1

Kevin
Kevin

Reputation: 7309

I think you want to add an event handler for the TextBox.SelectionChanged event and in it, compare the TextBox.SelectedText to the TextBox.Text

Upvotes: 0

Nikhil Agrawal
Nikhil Agrawal

Reputation: 48558

Because 

textBox1.SelectAll()

returns nothing or return type is void

just use

textBox1.SelectAll();

If you want to check if all text is selected or not check

if(textBox1.SelectedText == textBox1.Text)
{
     MessageBox.Show("You have selected all text in the textbox");
}

OR 

if(TextBox.SelectionLength == TextBox.Text.Length)
{
     MessageBox.Show("You have selected all text in the textbox");
}

Upvotes: 3

Tim Schmelter
Tim Schmelter

Reputation: 460028

Couldn't you simply check whether or not TextBox.SelectionLength == TextBox.Text.Length?

http://msdn.microsoft.com/en-us/library/system.windows.forms.textboxbase.selectionlength.aspx

You comparison fails because you're comparing the text with the return value of the SelectAll method which is void(it returns nothing since it just applies the selection).

Upvotes: 4

ABH
ABH

Reputation: 3439

Only use 

textBox1.SelectAll();

When this method is executed all the text in text box will be selected. You don't need to compare it with true. TextBox.SelectAll() return type is void. Comparing a boolean with void will give error off course.

Upvotes: 0

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