What’s wrong with this code? This code should remove all commas from strTest. Find the error(s) in the following code.
string strTest = "Bug,2,Bug";
strTest = strTest.Replace( "" );
The Replace method takes two arguments: one substring to search for, and another
substring to replace all matching occurrences of the first argument. The complete incorrect code reads:
// RemoveCommas.cs (Incorrect)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace RemoveCommas
{
///
/// Summary description for FrmRemoveCommas.
///
public class FrmRemoveCommas : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lblResult;
private System.Windows.Forms.Label lblOriginalOut;
private System.Windows.Forms.Label lblModified;
private System.Windows.Forms.Label lblOriginal;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmRemoveCommas()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent
// call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
// Windows Form Designer generated code
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run( new FrmRemoveCommas() );
}
// removes all commas from the string and displays the result
private void FrmRemoveCommas_Load(
object sender, System.EventArgs e )
{
string strTest = "Bug,2,Bug";
strTest = strTest.Replace( "" );
lblResult.Text = strTest;
} // end method FrmRemoveCommas_Load
} // end class FrmRemoveCommas
}
The complete corrected code should read:
// RemoveCommas.cs (Correct)
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace RemoveCommas
{
///
/// Summary description for FrmRemoveCommas.
///
public class FrmRemoveCommas : System.Windows.Forms.Form
{
private System.Windows.Forms.Label lblResult;
private System.Windows.Forms.Label lblOriginalOut;
private System.Windows.Forms.Label lblModified;
private System.Windows.Forms.Label lblOriginal;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public FrmRemoveCommas()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent
// call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
// Windows Form Designer generated code
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run( new FrmRemoveCommas() );
}
// removes all commas from the string and displays the result
private void FrmRemoveCommas_Load(
object sender, System.EventArgs e )
{
string strTest = "Bug,2,Bug";
strTest = strTest.Replace( ",", "" );
lblResult.Text = strTest;
} // end method FrmRemoveCommas_Load
} // end class FrmRemoveCommas
}
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