/* 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; using System.Data; namespace FormatAndParse { /// <summary> /// Summary description for FormatAndParse. /// </summary> public class FormatAndParse : System.Windows.Forms.Form { internal System.Windows.Forms.GroupBox GroupBox1; internal System.Windows.Forms.TextBox txtUnitCost; internal System.Windows.Forms.Label Label2; internal System.Windows.Forms.Label Label1; internal System.Windows.Forms.Label lblStatus; internal System.Windows.Forms.ComboBox cboModelName; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public FormatAndParse() { // // 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.txtUnitCost = new System.Windows.Forms.TextBox(); this.Label2 = new System.Windows.Forms.Label(); this.Label1 = new System.Windows.Forms.Label(); this.lblStatus = new System.Windows.Forms.Label(); this.cboModelName = new System.Windows.Forms.ComboBox(); this.GroupBox1.SuspendLayout(); this.SuspendLayout(); // // GroupBox1 // this.GroupBox1.Controls.AddRange(new System.Windows.Forms.Control[] { this.txtUnitCost, this.Label2}); this.GroupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.GroupBox1.Location = new System.Drawing.Point(12, 34); this.GroupBox1.Name = "GroupBox1"; this.GroupBox1.Size = new System.Drawing.Size(352, 136); this.GroupBox1.TabIndex = 22; this.GroupBox1.TabStop = false; // // txtUnitCost // this.txtUnitCost.Location = new System.Drawing.Point(150, 35); this.txtUnitCost.Name = "txtUnitCost"; this.txtUnitCost.Size = new System.Drawing.Size(128, 21); this.txtUnitCost.TabIndex = 14; this.txtUnitCost.Text = ""; // // Label2 // this.Label2.Location = new System.Drawing.Point(16, 40); this.Label2.Name = "Label2"; this.Label2.Size = new System.Drawing.Size(128, 16); this.Label2.TabIndex = 17; this.Label2.Text = "Display Value for Price:"; // // Label1 // this.Label1.Location = new System.Drawing.Point(14, 10); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(64, 16); this.Label1.TabIndex = 21; this.Label1.Text = "Product:"; // // lblStatus // this.lblStatus.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; this.lblStatus.Dock = System.Windows.Forms.DockStyle.Bottom; this.lblStatus.FlatStyle = System.Windows.Forms.FlatStyle.System; this.lblStatus.ForeColor = System.Drawing.SystemColors.HotTrack; this.lblStatus.Location = new System.Drawing.Point(0, 198); this.lblStatus.Name = "lblStatus"; this.lblStatus.Size = new System.Drawing.Size(372, 24); this.lblStatus.TabIndex = 20; // // cboModelName // this.cboModelName.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; this.cboModelName.Location = new System.Drawing.Point(78, 8); this.cboModelName.Name = "cboModelName"; this.cboModelName.Size = new System.Drawing.Size(248, 21); this.cboModelName.TabIndex = 19; // // FormatAndParse // this.AutoScaleBaseSize = new System.Drawing.Size(5, 14); this.ClientSize = new System.Drawing.Size(372, 222); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.GroupBox1, this.Label1, this.lblStatus, this.cboModelName}); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.Name = "FormatAndParse"; this.Text = "FormatAndParse"; this.Load += new System.EventHandler(this.FormatAndParse_Load); this.GroupBox1.ResumeLayout(false); this.ResumeLayout(false); } #endregion private void FormatAndParse_Load(object sender, System.EventArgs e) { DataSet dsStore = new DataSet(); dsStore.ReadXmlSchema(Application.StartupPath + "store.xsd"); dsStore.ReadXml(Application.StartupPath + "store.xml"); cboModelName.DataSource = dsStore.Tables["Products"]; cboModelName.DisplayMember = "ModelName"; // Create the binding. Binding costBinding = new Binding("Text", dsStore.Tables["Products"], "UnitCost"); // Connect the methods for formatting and parsing data. costBinding.Format += new ConvertEventHandler(DecimalToCurrencyString); costBinding.Parse += new ConvertEventHandler(CurrencyStringToDecimal); // Add the binding. txtUnitCost.DataBindings.Add(costBinding); } private void DecimalToCurrencyString(object sender, ConvertEventArgs e) { if (e.DesiredType == typeof(string)) { // Use the ToString method to format the value as currency ("c"). e.Value = ((decimal)e.Value).ToString("c"); } } private void CurrencyStringToDecimal(object sender, ConvertEventArgs e) { if (e.DesiredType == typeof(decimal)) { // Convert the string back to decimal using the shared Parse method. e.Value = Decimal.Parse(e.Value.ToString(), System.Globalization.NumberStyles.Currency, null); } } private void TableChanged(object sender, System.Data.DataColumnChangeEventArgs e) { lblStatus.Text = "Detected change. Column " + e.Column.ColumnName; lblStatus.Text += " updated to " + e.ProposedValue.ToString() + "."; } [STAThread] static void Main() { Application.Run(new FormatAndParse()); } } } FormatAndParse.zip( 48 k)