C#里的InputBox

ゝ一世哀愁。 2022-04-11 09:29 88阅读 0赞

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”);
    
                   }
    
             }