C#NET2008 DataValidation using IF statement

[lenniekuah]

Hullo Good Friends,
I am back again seeking help. Please help me.
I am using C#NET2008 Window Application, This is the situation. Should either one of this control, txtXMLFolder.Te xt , txtXMLName.Text , lblCustID.Text is BLANK, It should not activate FCreateXMLFile( ) Function.


I am using IF Statement to validate data and it generate this error message to my surprise.

Error 2 Operator '||' cannot be applied to operands of type 'bool' and 'string'

This is the coding that I tried to:

 
private void btnXML_Click(object sender, EventArgs e)
 {  //validate data pior to create XML File

   if ((this.txtXMLFolder.Text == "" ) ||  (this.txtXMLName.Text == "") ||  (this.lblCustID.Text = ""))
    {
     string txtmsg = "Either one of these data is missing" + "\n";
     txtmsg += "Customer Selection" + "\n";
     txtmsg += "XML File Creation" + "\n";
     txtmsg += "Select XML Stored Folder";

     MessageBox.Show(txtmsg, "XML Creation Cancelled ");
   }
   else
     {//create XML File 
       FCreateXMLFile();
     }
 } // end btnXML

[Anton Zinchenko]

private void btnXML_Click(object sender, EventArgs e)
 {  //validate data pior to create XML File
 
   [B]if ((this.txtXMLFolder.Text == "" ) ||  (this.txtXMLName.Text == "") ||  (this.lblCustID.Text == ""))[/B]
    {
     string txtmsg = "Either one of these data is missing" + "\n";
     txtmsg += "Customer Selection" + "\n";
     txtmsg += "XML File Creation" + "\n";
     txtmsg += "Select XML Stored Folder";
 
     MessageBox.Show(txtmsg, "XML Creation Cancelled ");
   }
   else
     {//create XML File 
       FCreateXMLFile();
     }
 } // end btnXML

[lenniekuah]

Hi Anton,
Thank you very much for sharing information with me.
I followed your sample and my coding is working now.
You are awesome and generous in sharing information.
Appreciate that very much.

I am so glad to meet you here at this Wonderful FORUM