Global Variables

[sjc0311]

I want to declare some WebControls on at a global level so I will have access to them and then instantiate them in certain methods. I was just wondering how to do this. When I try to declare them in Page_Init() it doesn't work. Obviously, I"m very new to ASP.NET, so could anyone please explain how to declare globabl variables for a single page? (not in the global.aspx file)

[Derek Stone]

Once you declare a WebControl as shown below, you can access it throughout the current page using its ID property.

 

<asp:TextBox id="MainTextBox" runat="server" />

Sub Page_Load(sender As Object, e As EventArgs)
   MainTextBox.Text = "foobar"
End Sub

[sjc0311]

I know my previous post was unclear, but here is what I actually wanted to do:

 

MyPlaceHolder.Controls.Add(GenerateTextBox());

 

then I would have something like this:

 

TextBox GenerateTextBox

{

TextBox MyTextBox = new TextBox();

 

return MyTextBox;

}

 

 

 

my question is how do I then get and set properties of this text box? I thought that I could declare it at the top of the scope like this:

 

TextBox MyTextBox;

 

Then I could instantiate it in the GenerateTextBox function, but when I try to maipulate properties it tells me that it doesn't point to an instance of an object. Thanks for any additional help!

[Derek Stone]

TextBox MyTextBox = new TextBox();

void page_load(Object sender, EventArgs e) {
   MyTextBox.Text = "foobar";
   MyPlaceHolder.Controls.Add(MyTextBox);
}

That should work fine, even if you decide to modify properties after the control is added to its placeholder.