why can't i access a function of a web control?-CodePudding

i have the next question:

I've got an .aspx which contains a lot of web controls, this is the one i care:

//line 5
<%@ Register src="Controls/UCAttachments.ascx" tagname="UCAttachments" tagprefix="uc1" %>

//line 430
<uc1:UCAttachments ID="UCAttachments" runat="server" Visible="false" />

On the selected index changed event of a combo box, i need to call a function of the web control, this is the code of the .aspx.cs.

private void cbo_SelectedIndexChanged( object sender, EventArgs e )
{
 if(this.op == 1){
 UCAttachments.visible=true;
 UCAttachments.loadById(this.id); <-this doesnt work.
//Even tho, i can access all the other functions of UCAttachments.
//More infor abkout the error:
//'CONTROL' does not contain a definition for 'loadById'and no accessible //method accepting first argument...

 }
}

public partial class Controls_UCAttachments: System.Web.UI.UserControl
{
//lots of functions
  public void loadById( string id )
  {
    string query = "SELECT * FROM table WHERE ID = "  id;
    //more code
    return ;

  }
}

CodePudding user response：

you have to make this method static

public partial class Controls_UCAttachments 
{
    //lots of functions
    static public void loadById(string id)
    {
        string query = "SELECT * FROM table WHERE ID = "   id;
        //more code
        return;

    }
}

and you can call using this syntax

Controls_UCAttachments.loadById(this.id);

CodePudding user response：

so.. very curious thing.

when you have a form which contains a lot of user controls, you need to wait for the metadata file to reload the new methods you've created.

So i closed my visual studio and re opeened a minutes later and the bug desapeared.