Csharp/CSharp Tutorial/GUI Windows Forms/DataBinding TextBox

Data Binding: StringCollection

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.Collections.Specialized; using System.ruponentModel; using System.Windows.Forms; public class DataBoundStringCollection : System.Windows.Forms.Form {

 private Button RightButton= new Button();
 private Button LeftButton= new Button();
 private TextBox textBox2 = new TextBox();
 private TextBox textBox1 = new TextBox();
 private Button DoneButton= new Button();
 private StringCollection sa=new StringCollection();
   public DataBoundStringCollection()
   {
   this.textBox2.Location = new Point(184, 16);
   this.RightButton.Location = new Point(192, 64);
   this.RightButton.Text = ">>";
   this.RightButton.Click += new EventHandler(this.RightButton_Click);
   this.textBox1.Location = new Point(8, 16);
   this.DoneButton.Location = new Point(104, 64);
   this.DoneButton.Text = "Done";
   this.DoneButton.Click += new EventHandler(this.DoneButton_Click);
   this.LeftButton.Location = new Point(16, 64);
   this.LeftButton.Text = "<<";
   this.LeftButton.Click += new EventHandler(this.LeftButton_Click);
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(294, 111);
   this.ControlBox = false;
   this.Controls.AddRange(new Control[] {
                 this.RightButton,
                 this.LeftButton,
                 this.textBox2,
                 this.textBox1,
                 this.DoneButton});
   this.FormBorderStyle = FormBorderStyle.FixedDialog;
   this.ShowInTaskbar = false;
   this.ResumeLayout(false);
   sa.Add("A");
   sa.Add("B");
   sa.Add("C");
   sa.Add("D");
   this.textBox1.DataBindings.Add("Text",sa,"");
   this.textBox2.DataBindings.Add("Text",sa,"");
   }
   public override void Dispose()
   {
       base.Dispose();
   }

 protected void RightButton_Click (object sender, System.EventArgs e)
 {
   this.BindingContext[sa].Position++;
 }
 protected void LeftButton_Click (object sender, System.EventArgs e)
 {
   this.BindingContext[sa].Position--;
 }
 protected void DoneButton_Click (object sender, System.EventArgs e)
 {
   Application.Exit();
 }
 public static void Main()
 {
   Application.Run(new DataBoundStringCollection());
 }

}</source>

Data Entry With Binding

<source lang="csharp">using System; using System.Drawing; using System.IO; using System.Windows.Forms; using System.Xml.Serialization; class MyClass : Form {

   XmlSerializer xmlser = new XmlSerializer(typeof(Employee));
   BindingSource bindsrc = new BindingSource();
   public static void Main()
   {
       Application.Run(new MyClass());
   }
   public MyClass()
   {
       bindsrc.Add(new Employee());
       EmployeePanel personpnl = new EmployeePanel(bindsrc);
       personpnl.Parent = this;
       personpnl.Dock = DockStyle.Fill;
       MenuStrip menu = new MenuStrip();
       menu.Parent = this;
       ToolStripMenuItem item = (ToolStripMenuItem) menu.Items.Add("&File");
       item.DropDownItems.Add("&New", null, FileNewOnClick);
       item.DropDownItems.Add("&Open...", null, FileOpenOnClick);
       item.DropDownItems.Add("Save &As...", null, FileSaveAsOnClick);
   }
   void FileNewOnClick(object objSrc, EventArgs args)
   {
       bindsrc[0] = new Employee();
   }
   void FileOpenOnClick(object objSrc, EventArgs args)
   {
       OpenFileDialog dlg = new OpenFileDialog();
       if (dlg.ShowDialog() == DialogResult.OK)
       {
           StreamReader sr = new StreamReader(dlg.FileName);
           bindsrc[0] = xmlser.Deserialize(sr);
           sr.Close();
       }
   }
   void FileSaveAsOnClick(object objSrc, EventArgs args)
   {
       SaveFileDialog dlg = new SaveFileDialog();
       if (dlg.ShowDialog() == DialogResult.OK)
       {
           StreamWriter sw = new StreamWriter(dlg.FileName);
           xmlser.Serialize(sw, bindsrc[0]);
           sw.Close();
       }
   }

} class EmployeePanel : FlowLayoutPanel {

   public EmployeePanel(BindingSource bindsrc)
   {
       Label lbl = new Label();
       lbl.Parent = this;
       lbl.Text = "First Name: ";
       lbl.AutoSize = true;
       lbl.Anchor = AnchorStyles.Left;
       TextBox txtboxFirstName = new TextBox();
       txtboxFirstName.Parent = this;
       txtboxFirstName.AutoSize = true;
       txtboxFirstName.DataBindings.Add("Text", bindsrc, "FirstName");
       txtboxFirstName.DataBindings[0].DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
       this.SetFlowBreak(txtboxFirstName, true);
       lbl = new Label();
       lbl.Parent = this;
       lbl.Text = "Last Name: ";
       lbl.AutoSize = true;
       lbl.Anchor = AnchorStyles.Left;
       TextBox txtboxLastName = new TextBox();
       txtboxLastName.Parent = this;
       txtboxLastName.AutoSize = true;
       txtboxLastName.DataBindings.Add("Text", bindsrc, "LastName");
       txtboxLastName.DataBindings[0].DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
       this.SetFlowBreak(txtboxLastName, true);
       lbl = new Label();
       lbl.Parent = this;
       lbl.Text = "Birth Date: ";
       lbl.AutoSize = true;
       lbl.Anchor = AnchorStyles.Left;
       DateTimePicker dtPicker = new DateTimePicker();
       dtPicker.Parent = this;
       dtPicker.AutoSize = true;
       dtPicker.DataBindings.Add("Value", bindsrc, "BirthDate");
       dtPicker.DataBindings[0].DataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged;
   }

} class Employee {

   public string FirstName;
   public string LastName;
   public DateTime BirthDate;

}</source>