.NET 开发中的一些小技巧集锦
15. 如何利用Crystal Report程序来生成PDF版本?(How to generate PDF version of Crystal Report programmatically?) Webjx.Com
| 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? ) Webjx.Com
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 Webjx.Com
| textBox1.Text="Line 1\r\nLine2\r\nLine3."; |
或者 Webjx.Com
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?)网页教学网
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 网页教学网
| 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"; |
Webjx.Com
19. 一个简单的创建链接字符串的方法。(An easy way to build connection string.)
网页教学网
记事本创建一个New.udl的文件,一个Microsoft 数据链接文件
网页教学网
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@address1.com,email@address2.com?cc=email@address3.com&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@address1.com,email@address2.com?subject=Hello&cc=email@address3.com &bcc=email@address4.com&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
Webjx.Com
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? ) Webjx.Com
通过设置控件背景色的alpha值网页教学网
| panel1.BackColor = Color.FromArgb(65, 204, 212, 230); |
Webjx.Com
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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