C# Tips 2则

C# Textbox Auto Scroll To End ScrollToCaret Scrolling Textbox
Many of my sample C# codes,
I use textbox to write the results.

When textbox is multiline property set to true, and when I insert text into it,
I want it to auto scroll to the last line.

Here is a simple way to auto scrolling textbox.

textbox1.SelectionStart = textbox1.Text.Length;
textbox1.ScrollToCaret();
textbox1.Refresh();

Textbox SelectionStart will force the textbox control to select the last part of the text,
and ScrollToCaret() function will auto scroll textbox to the end.

 

C# Convert Hexadecimal to Binary String Conversion

There is no need to code tons of codes, loops, to convert hex to binary string. Convert.ToInt32 function is very useful for this purpose.
Let's convert the "A" character to binary format.

private string hex2binary(string hexvalue)
{
  string binaryval = "";
  binaryval = Convert.ToString(Convert.ToInt32(hexvalue, 16), 2);
  return binaryval;
}

When we call hex2binary("A"); it will return "1010" similar samples below;
hex2binary("1a"); will return "11010";
hex2bianry("1a2c"); will return "1101000101100"; and so on.
Keep in mind that this hex to binary conversion style uses 32 bit integer number.