/* User Interfaces in C#: Windows Forms and Custom Controls by Matthew MacDonald Publisher: Apress ISBN: 1590590457 */ using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; namespace Validation { /// <summary> /// Summary description for SimpleValidation. /// </summary> public class SimpleValidation : System.Windows.Forms.Form { internal System.Windows.Forms.GroupBox GroupBox1; internal System.Windows.Forms.Label Label2; internal System.Windows.Forms.Label Label1; internal System.Windows.Forms.TextBox txtFirstName; internal System.Windows.Forms.TextBox txtLastName; internal System.Windows.Forms.Button Button1; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public SimpleValidation() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.GroupBox1 = new System.Windows.Forms.GroupBox(); this.Label2 = new System.Windows.Forms.Label(); this.Label1 = new System.Windows.Forms.Label(); this.txtFirstName = new System.Windows.Forms.TextBox(); this.txtLastName = new System.Windows.Forms.TextBox(); this.Button1 = new System.Windows.Forms.Button(); this.GroupBox1.SuspendLayout(); this.SuspendLayout(); // // GroupBox1 // this.GroupBox1.Controls.AddRange(new System.Windows.Forms.Control[] { this.Label2, this.Label1, this.txtFirstName, this.txtLastName}); this.GroupBox1.Location = new System.Drawing.Point(8, 12); this.GroupBox1.Name = "GroupBox1"; this.GroupBox1.Size = new System.Drawing.Size(368, 88); this.GroupBox1.TabIndex = 11; this.GroupBox1.TabStop = false; // // Label2 // this.Label2.Location = new System.Drawing.Point(16, 52); this.Label2.Name = "Label2"; this.Label2.Size = new System.Drawing.Size(64, 16); this.Label2.TabIndex = 8; this.Label2.Text = "Last Name:"; // // Label1 // this.Label1.Location = new System.Drawing.Point(16, 28); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(64, 16); this.Label1.TabIndex = 7; this.Label1.Text = "First Name:"; // // txtFirstName // this.txtFirstName.Location = new System.Drawing.Point(84, 24); this.txtFirstName.Name = "txtFirstName"; this.txtFirstName.Size = new System.Drawing.Size(152, 21); this.txtFirstName.TabIndex = 4; this.txtFirstName.Text = ""; this.txtFirstName.Validating += new System.ComponentModel.CancelEventHandler(this.txtName_Validating); // // txtLastName // this.txtLastName.Location = new System.Drawing.Point(84, 48); this.txtLastName.Name = "txtLastName"; this.txtLastName.Size = new System.Drawing.Size(152, 21); this.txtLastName.TabIndex = 5; this.txtLastName.Text = ""; this.txtLastName.Validating += new System.ComponentModel.CancelEventHandler(this.txtName_Validating); // // Button1 // this.Button1.Location = new System.Drawing.Point(152, 208); this.Button1.Name = "Button1"; this.Button1.Size = new System.Drawing.Size(76, 24); this.Button1.TabIndex = 10; this.Button1.Text = "OK"; this.Button1.Click += new System.EventHandler(this.Button1_Click); // // SimpleValidation // this.AutoScaleBaseSize = new System.Drawing.Size(5, 14); this.ClientSize = new System.Drawing.Size(384, 242); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.GroupBox1, this.Button1}); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.Name = "SimpleValidation"; this.Text = "SimpleValidation"; this.GroupBox1.ResumeLayout(false); this.ResumeLayout(false); } #endregion private void Button1_Click(object sender, System.EventArgs e) { this.Close(); } [STAThread] static void Main() { Application.Run(new SimpleValidation()); } private void txtName_Validating(object sender, System.ComponentModel.CancelEventArgs e) { if (((TextBox)sender).Text == "") { MessageBox.Show("You must enter a first and last name.", "Invalid Input", MessageBoxButtons.OK, MessageBoxIcon.Warning); e.Cancel = true; } } } }