C#里的InputBox

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

{

///

/// clsInputBox 的摘要说明。

///

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”);

}

}


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