Validation part

Question

I dont Know how to set the border color . if the user enter the wrong keyword then the border shows red color on it. let me know if anyone have this solution for this. I have attached sample image here. Thanks! i need exactly same like this.

James Axsom · Answer

Hi Muthukumar I am using WinForms and I know there is no border to color, but I hope my response gives you some inspiration and ideas for a solution for your application, because the concept is the same. Instead of a border I’m using the BackColor of the TextBox. Images of runtime application: Application Code: WinForms C# using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace Sandbox2 { public partial class MyMainForm : Form { string m_proposedPassword = string .Empty; public MyMainForm() { InitializeComponent(); } private void txtProposedPassword_Leave( object sender, EventArgs e) { m_proposedPassword = txtProposedPassword.Text.Trim(); } private System.Drawing.Color GetConfirmPasswordTextBoxColorState() { // Method: GetConfirmPasswordTextBoxColorState // Return: System.Drawing.Color // returns a color based on varying runtime conditions in the applications System.Drawing.Color result = SystemColors.Window; // Runtime conditions causing change of state // the value in txtProposedPassword does not match // the value in txtConfirmPassword string confirmText = txtConfirmPassword.Text.Trim(); Boolean condition1 = (confirmText != m_proposedPassword); if (condition1== true ) { result = Color.Pink; } return result; } private Boolean GetOKButtonEnabledState() { // Method: GetOKButtonEnabledState // Return: Boolean // returns a boolean based on varying runtime conditions in the application // Default value is always false Boolean result = false ; ; // Support Variables string confirmText = txtConfirmPassword.Text.Trim(); // conditions for true // condition1: there must be a string length greater than 0 in txtProposedPassword Boolean condition1 = (m_proposedPassword.Length>0); // condition2: there must a string length greater than 0 in txtConfirmPassword Boolean condition2 = (confirmText.Length > 0); // condition3: the value in txtProposedPassword does match the value in txtConfirmPassword Boolean condition3 = (confirmText == m_proposedPassword); // List additional conditions here... // Boolean condition4 = (Expression); // get the overall state result = (condition1 == true ) && (condition2 == true ) && (condition3 == true ); return result; } private void txtConfirmPassword_TextChanged( object sender, EventArgs e) { txtConfirmPassword.BackColor = GetConfirmPasswordTextBoxColorState(); btnOK.Enabled = GetOKButtonEnabledState(); } private void MyMainForm_Load( object sender, EventArgs e) { txtConfirmPassword.BackColor = GetConfirmPasswordTextBoxColorState(); btnOK.Enabled = GetOKButtonEnabledState(); } } } Have a great day!