WPF TextBoxBase（System.Windows.Controls.Primitives）获取文本

Question

How can I get the .Text from a WPF (System.Windows.Controls.Primitives) TextBoxBase. Here is the code:

    private TextBoxBase mTextBox;
    this.mTextBox.Text;

The WPF Controls does not contain a definitions for .Text I also tried using a TextRange but that did not work. Here is the code:

    string other = new TextRange(((RichTextBox)sender).Document.ContentStart, ((RichTextBox)sender).Document.ContentEnd).Text; 

How can I get the .Text from my WPF (System.Windows.Controls.Primitives) TextBoxBase?

Answer 1

There are not any Text property in the WPF RichTextBox control. Below is a way to get all texts:

string GetString(RichTextBox rtb)
 {
   var textRange = new TextRange(rtb.Document.ContentStart, rtb.Document.ContentEnd);
   return textRange.Text;
}

Answer 2

If you question stays at

How can I get the .Text from my WPF (System.Windows.Controls.Primitives) TextBoxBase ?

Then the short answer is: you can't since there is no such property.

Now the only known controls that directly inherit from TextBoxBase are TextBox and RichTextBox . TextBox DOES have a Text property, but RichTextBox DOESN'T.

If you are using TextBox, you can cast your object and then get the property:

var textBox = mTextBox as TextBox;
if (textBox != null)
{
    var text = textBox.Text;
}

Answer 3

Maybe use an extension method like this?

public static string GetTextValue(this TextBoxBase source)
{
    // need to cast TextBoxBase to one of its implementations
    var txtControl = source as TextBox;
    if (txtControl == null)
    {
        var txtControlRich = source as RichTextBox;
        if (txtControlRich == null) return null;
        return txtControlRich.Text;
    }

    return txtControl.Text;
}

I haven't tested this code, but hopefully you get the general idea.