How do I use the Trim Function - arrays

Question

I'm converting a web project from VB to C#, and I can't figure out how to implement the trim function. Do I have to write a specific function, or is there a way to use it in the context of my project? Here is the functional VB code I'm trying to convert. If you need more details, please ask.
Protected Sub ButtonSetup(ByVal Dr As DataRow, ByVal Btn As Button)
Btn.Visible = True
Btn.Text = Dr("Floor_Name").ToString.Trim()
Btn.CommandArgument = Dr("Floor_File").ToString.Trim()
Btn.CssClass = "GreyButtonStyle"
AddHandler Btn.Click, AddressOf Me.Schematic_Button_Click
End Sub

Answer 1

Indexer
C# uses the square bracket[] to access element of an indexer instead of parentheses()
Event Handler
AddHandler and AddressOf are both VB keyword. In order to add an handler to an event, use the += operator with the event as left operand and handler as the right operand.
protected void ButtonSetup(DataRow row, Button button)
{
button.Visible = true;
button.Text = row["Floor_Name"].ToString().Trim();
button.CommandArgument = row["Floor_Name"].ToString().Trim();
button.CssClass = "GreyButtonStyle";
button.Click += Schematic_Button_Click;
}

Answer 2

I work in C# and your code is VB, but it looks like you are just calling it wrong.
You have
Btn.Text = Dr("Floor_Name").ToString.Trim()
Which accesses the ToString method of the data row and calls Trim() on it. You aren't actually calling ToString. Change it to
Btn.Text = Dr("Floor_Name").ToString().Trim()
and it should work.