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<p >一个稍微复杂一点的程序一般都有二个或者更多的窗体。有时在程序设计中,数据不仅要在同一个窗体中传递,还要在窗体间传递,这种传递是主窗体与从窗体之间数据的互相传递。从本文开始,我们将列举不同窗体间数据传递的四种情况,和用Visual C#实现这四种情况的具体方法。下面先介绍用Visual C#实现窗体间传递数据中第一种情况——从主窗体向从窗体传递字符串。在阅读完本文后,你还尝试一下利用此方法在窗体间传送数值等数据。<p ><b>本文中程序设计、调试、运行的软件环境:</b><p >Windows2000 服务器版<p >Visual Studio.Net正式版,.Net FrameWork SDK版本号3705<p ><b>实现步骤:</b><p >1.启动Visual Studio .Net<p >2.选择菜单【文件】|【新建】|【项目】后,弹出【新建项目】对话框<p >3.将【项目类型】设置为【Visual C#项目】<p >4.将【模板】设置为【控制台应用程序】<p >5.在【名称】文本框中输入【VC#中不同窗体数据传递方法01】<p >6.在【位置】的文本框中输入【E:\VS.NET项目】,然后单击【确定】按钮,这样VC#中不同窗体数据传递方法01项目就创建完成了<p >7.把Visual Studio.Net的当前窗口切换到【Form1.cs(设计)】窗口,并从【工具箱】中的【Windows窗体】选项卡中拖入下列组件到【Form1.cs(设计)】窗体中,并执行相应操作:<p >· 二个TextBox组件,用以输入向Form2窗体传送的数据<p >· 二个Label组件<p >· 一个Button组件,名称为button1,并在拖入【Form1.cs(设计)】窗体后,双击它,则Visual Stuido .Net产生其Click事件对应的处理代码。<p >8.把Visual Studio .Net的当前窗口切换到【Form1.cs】窗口,即:Form1.cs的代码编辑窗口。并用下列代码替换替代系统产生的InitializeComponent过程。<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>private void InitializeComponent ( ){ this.button1 = new System.Windows.Forms.Button ( ) ; this.textBox1 = new System.Windows.Forms.TextBox ( ) ; this.textBox2 = new System.Windows.Forms.TextBox ( ) ; this.label1 = new System.Windows.Forms.Label ( ) ; this.label2 = new System.Windows.Forms.Label ( ) ; this.SuspendLayout ( ) ; this.button1.Location = new System.Drawing.Point ( 103 , 149 ) ; this.button1.Name = "button1" ; this.button1.Size = new System.Drawing.Size ( 75 , 36 ) ; this.button1.TabIndex = 0 ; this.button1.Text = "发送" ; this.button1.Click += new System.EventHandler ( this.button1_Click ) ; this.textBox1.Location = new System.Drawing.Point ( 93 , 56 ) ; this.textBox1.Name = "textBox1" ; this.textBox1.Size = new System.Drawing.Size ( 122 , 21 ) ; this.textBox1.TabIndex = 1 ; this.textBox1.Text = "" ; this.textBox2.Location = new System.Drawing.Point ( 93 , 99 ) ; this.textBox2.Name = "textBox2" ; this.textBox2.Size = new System.Drawing.Size ( 123 , 21 ) ; this.textBox2.TabIndex = 2 ; this.textBox2.Text = "" ; this.label1.Location = new System.Drawing.Point ( 29 , 57 ) ; this.label1.Name = "label1" ; this.label1.TabIndex = 3 ; this.label1.Text = "欢迎词:" ; this.label2.Location = new System.Drawing.Point ( 16 , 100 ) ; this.label2.Name = "label2" ; this.label2.TabIndex = 4 ; this.label2.Text = "提示信息:" ; this.AutoScaleBaseSize = new System.Drawing.Size ( 6 , 14 ) ; this.ClientSize = new System.Drawing.Size ( 263 , 223 ) ; this.Controls.AddRange ( new System.Windows.Forms.Control[ ] { this.textBox2 , this.textBox1 , this.button1 , this.label2 , this.label1 } ) ; this.Name = "Form1" ; this.Text = "Form1" ; this.Load += new System.EventHandler ( this.Form1_Load ) ; this.ResumeLayout ( false ) ;}</ccid_code></pre></td></tr></table></ccid_nobr><p >此时,VC#中不同窗体数据传递方法01项目的主窗体Form1的设计界面就完成了,具体如图1所示:<p ><center><img src="http://www.hh010.com/upload_files/article/244/9_tz8eiw48037.jpg"></center><p ><center>图1:VC#中不同窗体数据传递方法01项目主窗体设计界面</center><p >9.把Visual Studio.Net的当前窗口切换到Form1.cs的代码编辑窗口,并用下列代码替换Form1.cs中button1组件的Click事件对应的处理代码。<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>private void button1_Click ( object sender , System.EventArgs e ) { Form2 myForm = new Form2 ( textBox1.Text , textBox2.Text ) ; myForm.Show ( ) ; }</ccid_code></pre></td></tr></table></ccid_nobr><p >10.选择菜单【项目】|【添加Windows窗体】后,弹出【添加新项-VC#中不同窗体数据传递方法01】对话框。在此对话框中的【名称(N):】文本框中输入【Form2】后,单击【打开】按钮,则在VC#中不同窗体数据传递方法01项目中添加了一个新的窗体,名称为【Form2】。<p >11.把Visual Studio.Net的当前窗口切换到【Form2.cs(设计)】窗口,并从【工具箱】中的【Windows窗体】选项卡中拖入下列组件到【Form2.cs(设计)】窗体中,并执行相应操作:<p >· 二个TextBox组件,用以显示从Form1传送来的字符串数据<p >· 二个Label组件<p >· 一个Button组件,名称为button1,并在拖入【Form2.cs(设计)】窗体后,双击它,则Visual Stuido .Net产生其Click事件对应的处理代码。<p >12.把Visual Studio.Net的当前窗口切换到Form2.cs的代码编辑窗口,并在定义Form2代码的后部添加下列代码,下列代码是定义二个字符串变量,用以接收从Form1传送来的字符串数据:<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>private string str1 , str2 ;</ccid_code></pre></td></tr></table></ccid_nobr><p >13.并用下列代码替换系统产生的Form2对应的代码:<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>public Form2 ( string sendData01 , string sendData02 ){ // // Windows 窗体设计器支持所必需的 // InitializeComponent ( ) ; str1 = sendData01 ; str2 = sendData02 ; // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 //}</ccid_code></pre></td></tr></table></ccid_nobr><p >14.用下列代码替换Form2.cs中的由Visual Studio .Net系统产生的InitializeComponent过程:<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>private void InitializeComponent ( ){ this.textBox2 = new System.Windows.Forms.TextBox ( ) ; this.textBox1 = new System.Windows.Forms.TextBox ( ) ; this.button1 = new System.Windows.Forms.Button ( ) ; this.label2 = new System.Windows.Forms.Label ( ) ; this.label1 = new System.Windows.Forms.Label ( ) ; this.SuspendLayout ( ) ; this.textBox2.Location = new System.Drawing.Point ( 109 , 93 ) ; this.textBox2.Name = "textBox2" ; this.textBox2.Size = new System.Drawing.Size ( 123 , 21 ) ; this.textBox2.TabIndex = 7 ; this.textBox2.Text = "" ; this.textBox1.Location = new System.Drawing.Point ( 109 , 50 ) ; this.textBox1.Name = "textBox1" ; this.textBox1.Size = new System.Drawing.Size ( 122 , 21 ) ; this.textBox1.TabIndex = 6 ; this.textBox1.Text = "" ; this.button1.Location = new System.Drawing.Point ( 75 , 143 ) ; this.button1.Name = "button1" ; this.button1.Size = new System.Drawing.Size ( 119 , 43 ) ; this.button1.TabIndex = 5 ; this.button1.Text = "显示传送来数据" ; this.button1.Click += new System.EventHandler ( this.button1_Click ) ; this.label2.Location = new System.Drawing.Point ( 32 , 94 ) ; this.label2.Name = "label2" ; this.label2.TabIndex = 9 ; this.label2.Text = "提示信息:" ; this.label1.Location = new System.Drawing.Point ( 45 , 51 ) ; this.label1.Name = "label1" ; this.label1.TabIndex = 8 ; this.label1.Text = "欢迎词:" ; this.AutoScaleBaseSize = new System.Drawing.Size ( 6 , 14 ) ; this.ClientSize = new System.Drawing.Size ( 265 , 228 ) ; this.Controls.AddRange ( new System.Windows.Forms.Control[ ] { this.textBox2 , this.textBox1 , this.button1 , this.label2 , this.label1 } ) ; this.Name = "Form2" ; this.Text = "Form2" ; this.ResumeLayout ( false ) ;}</ccid_code></pre></td></tr></table></ccid_nobr><p >15.用下列代码替换Form2.cs中button1组件Click事件对应的处理代码,下列代码的作用是把从Form1窗体中接收来的字符串数据通过同样的方式显示出来:<p ><ccid_nobr><table width="550" border="1" cellspacing="0" cellpadding="2" bordercolorlight = "black" bordercolordark = "#FFFFFF" align="center"><tr><td bgcolor="e6e6e6" class="code"><pre><ccid_code>private void button1_Click ( object sender , System.EventArgs e ){ textBox1.Text = str1 ; textBox2.Text = str2 ;}</ccid_code></pre></td></tr></table></ccid_nobr><p >16.至此,在上述步骤都正确完成,并全部保存后,VC#中不同窗体数据传递方法01项目的全部工作就完成了。图02是VC#中不同窗体数据传递方法01程序的运行界面。其中Form2中显示出来的字符串就是从主窗体中传递过去的。<p ><center><img src="http://www.hh010.com/upload_files/article/244/9_tdiwpb48038.jpg"></center><p ><center>图02:VC#中不同窗体数据传递方法01程序的运行界面</center><p ><center><font color="#000099"><strong>总结</strong></font></center><p >用Visual C#实现窗体间数据传递的第一种情况的全部工作就完成了,细心的读者已经发现,这种方法明显存在一个主要缺点,就是主窗体向从窗体传递数据的数目是固定的。这个缺点将在下一篇文章中彻底加以解决。<p >(责任编辑 <ccid_nobr>Sunny</ccid_nobr>) <p align="center"></p></p> |
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