String CompareTo Example to compare strings

 In this post we will see how to use String.CompareTo Method to match two strings. CompareTo Method returns following values:

1. CompareTo Method returns. 
2. Less than Zero.{when value of string with which we are compairing is greater than second value}. 
3. Zero when strings match.
4. Greater than Zero {when value of second string is greater than value with which we are compairing}.

Step 1: Take two Textboxes to receive input, one label to show output message and Button.

 

                

                    

                        String1: 
                        
                    
                
                

                    

                        String2: 
                        
                    
                
                

                    

                         
                    
                
            

Step 2: Codebehind:

protected void btnCompare_Click(object sender, EventArgs e)
    {
        int a = txtInputValue1.Text.ToString().CompareTo(txtInputValue2.Text);
        lblResult.Text = a.ToString();

        if (a == 0)
        {
            lblResult.Text = "Strings entered are same.";
        }
        else
        {
            lblResult.Text = "Strings entered are not same.";
        }
    }

Final Output: