ASF.net窗体对话框的实现
作者 佚名技术
来源 NET编程
浏览
发布时间 2012-05-22
| aces: '' Imports System.IO '' Imports System.Drawing.Imaging '' Without these import statements at the beginning of your code, '' the code example will not function. Private Sub Button2_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click '' Display an SaveFileDialog so the user can save the Image '' assigned to Button2. Dim saveFileDialog1 As New SaveFileDialog() saveFileDialog1.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif" saveFileDialog1.Title = "Save an Image File" saveFileDialog1.ShowDialog() '' If the file name is not an empty string open it for saving. If saveFileDialog1.FileName <> "" Then '' Save the Image via a FileStream created by the OpenFile method. Dim fs As FileStream = CType(saveFileDialog1.OpenFile(), FileStream) '' Save the Image in the appropriate ImageFormat based upon the '' file type selected in the dialog box. '' NOTE that the FilterIndex property is one-based. Select Case saveFileDialog1.FilterIndex Case 1 Me.button2.Image.Save(fs, ImageFormat.Jpeg) Case 2 Me.button2.Image.Save(fs, ImageFormat.Bmp) Case 3 Me.button2.Image.Save(fs, ImageFormat.Gif) End Select fs.Close() End If End Sub // C# // NOTE: You must import the following namespaces: // using System.IO; // using System.Drawing.Imaging; // Without these import statements at the beginning of your code, // the code example will not function. private void button2_Click(object sender, System.EventArgs e) { // Display an SaveFileDialog so the user can save the Image // assigned to Button2. SaveFileDialog saveFileDialog1 = new SaveFileDialog(); saveFileDialog1.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif"; saveFileDialog1.Title = "Save an Image File"; saveFileDialog1.ShowDialog(); // If the file name is not an empty string open it for saving. if(saveFileDialog1.FileName != "") { // Save the Image via a FileStream created by the OpenFile method. FileStream fs = (FileStream)saveFileDialog1.OpenFile(); // Save the Image in the appropriate ImageFormat based upon the // File type selected in the dialog box. // NOTE that the FilterIndex property is one-based. switch(saveFileDialog1.FilterIndex) { case 1 : this.button2.Image.Save(fs,ImageFormat.Jpeg); break; case 2 : this.button2.Image.Save(fs,ImageFormat.Bmp); break; case 3 : this.button2.Image.Save(fs,ImageFormat.Gif); break; } fs.Close(); } } 关于写入文件流的进一步信息，请参阅 FileStream.BeginWrite 方法。 ColorDialog 组件 此对话框显示颜色列表，并且返回所选的颜色。 与前两种对话框不同，ColorDialog 组件很容易实现其主要功能(挑选颜色)。选取的颜色将成为 Color 属性的设定值。因此，使用颜色就和设定属性值一样简单。在下面的例子中，按钮控制的 Click 事件将会开启一个 ColorDialog 组件。一旦用户选中某种颜色，并且单击了 OK ，按钮的背景将被设成所选的颜色。本例假设存在名为 Button1 的 Button 组件和名为 ColorDialog1 的 ColorDialog 组件。
|
凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务，公司网站：http://www.lingzhong.cn 为了给广大客户了解更多的技术信息，本技术文章收集来源于网络,凌众科技尊重文章作者的版权，如果有涉及你的版权有必要删除你的文章，请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息，谢谢! |
你可能对下面的文章感兴趣
关于ASF.net窗体对话框的实现的所有评论
