InputBox in C#

This example demonstrates how to show an InputBox in C# using simple static method.

The following code shows the usage of an InputBox static method that simulates InputBox method known from VB and VB.NET. Our InputBox method is defined in a custom class Tmp.

string value = "Document 1";
if (Tmp.InputBox("New document", "New document name:", ref value) == DialogResult.OK)
{
myDocument.Name = value;
}

The method's imple­mentation is in the following code. The method takes three paramaters: a dialog title, a prompt text and the default textbox value. It returns a DialogResult to detect wheather the OK or the Cancel button has been clicked. The input value can be obtained from the input/output parameter value.

using System.Windows.Forms;
using System.Drawing;

public static DialogResult  InputBox(string title, string promptText, ref string value)
{
   Form form = new Form();
   Label label = new Label();
   TextBox textBox = new TextBox();
   Button buttonOk = new Button();
   Button buttonCancel = new Button();

   form.Text = title;
   label.Text = promptText;
   textBox.Text = value;

   buttonOk.Text = "OK";
   buttonCancel.Text = "Cancel";
   buttonOk.DialogResult = DialogResult.OK;
   buttonCancel.DialogResult = DialogResult.Cancel;

   label.SetBounds(9, 20, 372, 13);
   textBox.SetBounds(12, 36, 372, 20);
   buttonOk.SetBounds(228, 72, 75, 23);
   buttonCancel.SetBounds(309, 72, 75, 23);

   label.AutoSize = true;
   textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
   buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
   buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

   form.ClientSize = new Size(396, 107);
   form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });
   form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
   form.FormBorderStyle = FormBorderStyle.FixedDialog;
   form.StartPosition = FormStartPosition.CenterScreen;
   form.MinimizeBox = false;
   form.MaximizeBox = false;
   form.AcceptButton = buttonOk;
   form.CancelButton = buttonCancel;

   DialogResult dialogResult = form.ShowDialog();
   value = textBox.Text;
   return dialogResult;
}

resource from http://www.csharp-examples.net/