在.NET Framework中并没有类似VB中的InputBox函数，虽然可以借助对VB 的Runtime引用，以在VB除外的.NET程序中使用VB的InputBox，但是为什么不自己写一个类实现类似的功能呢？
下面一个类实现了类似的InputBox函数的功能:
using System;
using System.Windows.Forms;
namespace Input
{
/// <summary>
/// clsInputBox 的摘要说明。
/// </summary>
public class InputBox : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox txtData;
private System.Windows.Forms.Label lblInfo;
private System.ComponentModel.Container components = null;
private InputBox()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.txtData = new System.Windows.Forms.TextBox();
this.lblInfo = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// txtData
//
this.txtData.Font = new System.Drawing.Font("宋体", 10.5F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.txtData.Location = new System.Drawing.Point(19, 8);
this.txtData.Name = "txtData";
this.txtData.Size = new System.Drawing.Size(317, 23);
this.txtData.TabIndex = 0;
this.txtData.Text = "";
this.txtData.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txtData_KeyDown);
//
// lblInfo
//
this.lblInfo.BackColor = System.Drawing.SystemColors.Info;
this.lblInfo.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.lblInfo.FlatStyle = System.Windows.Forms.FlatStyle.System;
this.lblInfo.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.lblInfo.ForeColor = System.Drawing.Color.Gray;
this.lblInfo.Location = new System.Drawing.Point(19, 32);
this.lblInfo.Name = "lblInfo";
this.lblInfo.Size = new System.Drawing.Size(317, 16);
this.lblInfo.TabIndex = 1;
this.lblInfo.Text = "[Enter]确认 | [Esc]取消";
//
// InputBox
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(350, 48);
this.ControlBox = false;
this.Controls.Add(this.lblInfo);
this.Controls.Add(this.txtData);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.Name = "InputBox";
this.Text = "InputBox";
this.ResumeLayout(false);
}
//对键盘进行响应
private void txtData_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
if(e.KeyCode == Keys.Enter)
{
this.Close();
}
else if (e.KeyCode == Keys.Escape )
{
txtData.Text = string.Empty ;
this.Close();
}
}
//显示InputBox
public static string ShowInputBox(string Title,string keyInfo)
{
InputBox inputbox = new InputBox();
inputbox.Text =Title;
if (keyInfo.Trim() != string.Empty )
inputbox.lblInfo.Text =keyInfo;
inputbox.ShowDialog();
return inputbox.txtData.Text;
}
}
}
直接调用该类的静态方法ShowInputBox就可以，其中Title参数是对话框的Text，keyInfo参数是标签lblInfo(可以显示自定义的信息)的Text。具体调用如下:
private void button_Click(object sender, System.EventArgs e)
{
//Microsoft.VisualBasic.Interaction.InputBox( "type your name ", "input ","",0,0);
//可以将你要显示的文本信息代替下面的string.Empty。
string inMsg= Input.InputBox.ShowInputBox("输入信息",string.Empty );
//对用户的输入信息进行检查
if (inMsg.Trim() != string.Empty )
{
MessageBox.Show(inMsg);
}
else if
{
MessageBox.Show(“输入为string.Empty”);
}
}
