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1. 如何创建一个可改变大小没有标题栏的窗体?(How to create a form with resizing borders and no title bar?)
| form1.Text = string. Empty; form1.ControlBox = false; |
2. 如何在.NET的Windows窗体上启用XP主题集?(How to use XP Themes with Windows Forms using the .NET?)
确认你的控件中FlatStyle属性已经修改为System,再修改Main方法。
| static void Main() { Application.EnableVisualStyles(); Application.DoEvents(); Application. Run(new Form1()); } |
3. 如何为一个窗体设置一个默认按钮?(How to set the default button for a form?)
| form1.AcceptButton = button1; |
4. 如何为一个窗体设置一个取消按钮?(How to set the Cancel button for a form?)
| form1.CancelButton = button1; |
5. 如何阻止一个窗体标题显示在任务栏上?(How to prevent a form from being shown in the taskbar?)
设置窗体的ShowIntaskbar属性为False
6. 如何用现有可用字体绑定到ComboBox控件?(How to fill a ComboBox with the available fonts?)
| comboBox1.Items.AddRange (FontFamily.Families); |
7. 如何禁止TextBox控件默认的邮件菜单?(How to disable the default ContextMenu of a TextBox?)
| textBox1.ContextMenu = new ContextMenu (); |
8. 如何获取“我的文档”等一些系统文件夹路径?(How to get the path for "My Documents" and other system folders?)
Environment.SpecialFolder中包含了一些系统文件夹信息
| MessageBox.Show(Environment.GetFolderPath( Environment.SpecialFolder.Personal )); |
9. 如何获取应用程序当前执行的路径?(How to get the path to my running EXE?)
| string appPath = Application.ExecutablePath; |
10. 如何确定当前运行的系统?(How to determine which operating system is running?)
| OperatingSystem os = Environment.OSVersion; MessageBox.Show(os.Version.ToString()); MessageBox.Show(os.Platform.ToString()); |
11. 如何从完整的路径中获取文件名?(How to get a file "s name from the complete path string?)
用System.IO.Path.GetFileName 和 System.IO.Path.GetFileNameWithoutExtension(无扩展名)的方法
12. 如何从完整的路径中获取文件扩展名?(How to get a file "s extension from the complete path string?)
用System.IO.Path.GetExtension方法
13. 如何使没有选择日期的DateTimePicker控件为空文本?(How to make the DateTimePicker show empty text if no date is selected?)
| dateTimePicker1.CustomFormat = " "; dateTimePicker1.Format = DateTimePickerFormat.Custom; |
14. 如何在Report Viewer中隐藏Crystal Report的状态栏?(How to hide the status bar of Crystal Report in Report Viewer?)
| foreach(object obj in this.crystalReportViewer1.Controls) { if( obj.GetType()== typeof(System.Windows.Forms.StatusBar)) { StatusBar sBar=(StatusBar)obj; sBar.Visible=false; } } |
15. 如何利用Crystal Report程序来生成PDF版本?(How to generate PDF version of Crystal Report programmatically?)
| ReportDocument O_Report=new ReportDocument(); ExportOptions exportOpts = new ExportOptions(); PdfRtfWordFormatOptions pdfFormatOpts = new PdfRtfWordFormatOptions (); DiskFileDestinationOptions diskOpts = new DiskFileDestinationOptions(); exportOpts = O_Report.ExportOptions; // 设置PDF格式 exportOpts.ExportFormatType = ExportFormatType.PortableDocFormat; exportOpts.FormatOptions = pdfFormatOpts; // 设置文件选项和导出 exportOpts.ExportDestinationType = ExportDestinationType.DiskFile; diskOpts.DiskFileName = "C://Trial.pdf"; //设置PDF导出路径 exportOpts.DestinationOptions = diskOpts; O_Report.Export (); |
16.通过代码如何输入多行文本?(How to enter multiline text in textbox through code? )
利用TextBox控件的LINES属性
| string [] strAddress = {"Mukund Pujari","Global Transformation Technologies","Pune, India"}; textBox1.MultiLine=true; textBox1.Lines=strAddress; |
或者
| textBox1.Text="Line 1\r\nLine2\r\nLine3."; |
或者
用"System.Environment.NewLine"来替代换行符号
17. 如何在DataGrid中去掉CheckBox不确定状态?(How to remove the indeterminate status of checkbox in datagrid?)
| DataGridTableStyle ts1 = new DataGridTableStyle(); //创建Table样式 ts1.MappingName = "Items"; //分配要应用样式的Data Table DataGridColumnStyle boolCol = new DataGridBoolColumn(); // 创建CheckBox列 boolCol.MappingName = "ch"; //分配数据列名称 boolCol.AllowNull=false; // 修改AllowNull属性 |
18. 如何在用一个数据源DataTable绑定两个控件,确保变化不反映在两个控件中?( How to bind two controls to the same DataTable without having changes in one control also change the other control?)软晨学习网
我们在一个Form中放置一个ListBox和一个ComboBox控件,当数据源是一个DataTable而且绑定的ValueMember一致的时候我们选择ListBox中的一个Item时,ComboBox控件中的相同的Item也会被自动选中,我们可以采取建立新的上下文绑定对象来拒绝这样的同步操作
| comboBox1.DataSource = dataset.Tables[ "Items" ]; comboBox1.ValueMember = "CustomerID"; comboBox1.DisplayMember = "CustomerID"; listBox1.BindingContext = new BindingContext(); // 设置新的上下文绑定对象 listBox1.DataSource = dataset.Tables[ "Items" ]; listBox1.ValueMember = "CustomerID"; listBox1.DisplayMember = "CustomerID"; |
19. 一个简单的创建链接字符串的方法。(An easy way to build connection string.)
记事本创建一个New.udl的文件,一个Microsoft 数据链接文件
双击打开,熟悉吧
按照向导创建完成一个数据库链接,测试成功
确定后,链接字符串写入这个文件,用记事本打开就看到了
20. 如何打开客户端E-Mail程序,Windows应用和Web应用?( How to open default E-mail client on your system with all parameters entered in it,like Outlook Express or Eudora, from your .NET windows or Web Application? )
| Web Application: A href="mailto:[email protected],[email protected][email protected]&Subject=Hello&body=Happy New Year" Windows Application: 引用System.Diagnostics.Process 命名空间 Process process = new Process(); process.StartInfo.FileName = "mailto:[email protected],[email protected]?subject=Hello&[email protected] &[email protected]&body=Happy New Year" ; process.Start(); |
21. VB.NET和C#有什么不同?( What is difference beween VB.NET and C#.NET? )
去微软下载一个文档吧,http://download.microsoft.com/download/6/3/5/6354bf47-c597-4029-89e9-2495e7539ab9/vbcsharpwp.exe
22. 如何使Windows Form上的Panel或者Label控件半透明?(How to make a Panel or Label semi-transparent on a Windows Form? )
通过设置控件背景色的alpha值软晨学习网
| panel1.BackColor = Color.FromArgb(65, 204, 212, 230); |
注意:在设计时手动输入这些值,不要用颜色选取
23. C#程序的主函数写[STA Thread] 属性是什么目的?(What is the purpose of the [STA Thread] attribute for the Main method of a C# program? )
http://community.csdn.net/Expert/topic/4132/4132313.xml?temp=.2285272
24. 如何触发Button的Click事件?(How to trigger a button click event? )
| button1.PerformClick(); |
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