catch exception ex throw ex

Using system;Using system. Collections. Generic;Using system. LINQ;Using system. text;Using system. IO; Namespace test_try_catch_finally{Class Program{Private Static bool openfile (){Bool ret = false;Try{Try{File. Open (@ "C: \ WINDOWS \ notepad. X"

I haven't written anything for a long time. I suddenly thought I had never written an email. I checked the information and wrote a simple Mailmessage mymm = new mailmessage ();Mymm. From = new mailaddress ("email address ");Mymm. to. Add (New

1. Database Connection 1. Connect to the database where the database needs to be connected. For example: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 public class SQLHleper 2 { 3 public

C # When calling an unmanaged dynamic library, you often need to detach the dynamic library in real time. This example shows how to load, obtain method delegation, and detach a dynamic library: [Dllimport ("kernel32.dll")]Public static extern int

Some time ago I wrote a (http://www.cnblogs.com/EddyPeng/archive/2012/07/27/2611835.html) about XML serialization and deserialization, and recently suddenly found a problem, that is, when the XML node value is empty, the serialized XML node is in

The pagination of datalist and repeater is required for the project. However, the control for loading data does not provide the paging function itself. You need to control the query statement for paging, but the statement is too complicated, or

Because it takes a long time to use recursive algorithms when using Treeview to display large-capacity database data, users are required to wait for a long time. So how can we improve the user experience when using Treeview to display large-capacity

/// /// Author: Bruce Lee) /// Created time: /// Description: Get personal Web site. /// Mender: /// Modify time: /// Modify description: /// /// personal account, for example: "satyambrucelee \ Administrator", for example, "satyambrucelee \

(1) Save the source object to TXT text in a certain format Public bool savetotxtfile (list pslist){Bool bresult = false;System. Io. filestream FS = NULL;System. Io. streamwriter Sw = NULL;Try{// Create a file streamFS = new system. Io. filestream

I wrote an example for uploading files through Web services. If you are free, take a look. I wrote an example just now. I tried to use WebService to upload files. You can also paste the example here: Server code: The server code implements a simple

Use SQLite for website search Download the demo project-389 KB Database file-1.38 KB Download source code-111 KB Introduction If your website or program needs a text search engine, unless you write one, otherwise, you will hand over the data

The Asynchronous Method is to customize a class that inherits the WebService class you reference and assign a value to an attribute. public class MasterService : MasterDataServiceSoapClient { public MasterService() : base()

Method 1, Java. SQL. Connection con = getyourconnection ();Resultset rs = con. getmetadata (). gettables (null, null, "yourtable", null );If (Rs. Next ()){ // Yourtable exist} Else {// Yourtable not exist} Method 2, Connection conn =

Configuration environment: tomcat5.5, mysql4.1, mysql-connector-java-5.0.0-beta, commons-dbcp-1.2.1, jdk1.5 above the "Dongdong" can go to the Internet. Then in D: \ tomcat5.5 \ webapps \ new directory dbtest folder, dbtest to create such

Sometimes we often need to import datasets into the database. What should we do? Some people have said that SQL statements can be used to solve the problem right away. Yes, SQL statements can be used to solve the problem. However, SQL concatenation

  C #Exception Handling Method   C #All exceptions that can be thrown in are directly or indirectly inherited fromSystem. ExceptionClass   The following statement blocks are supported to capture exceptions: Try... Catch Try... Catch...

Using system; Using system. Collections. Generic; Using system. text; Using system. IO; Using Microsoft. Win32; Using system. diagnostics; Namespace uni. unicustoms{Public class clswinrar{/// /// Whether WinRAR is installed/// /// Static public

CSV files, commonly known as "comma-separated files". You can use iostream to read CSV files in a specified format... I thought it was just this way, huh, huh, until one day, I saw the text connection on www.connectionstrings.com. String: Text

Private void openforeditsheet (string strfilepath, string strsheetname) {Microsoft. office. interOP. excel. applicationclass xlapp = new applicationclass (); Microsoft. office. interOP. excel. workbooks xlworkbooks; Microsoft. office. interOP. excel.

Copy codeThe Code is as follows: using System; Using System. Collections; Using System. Collections. Specialized; Using System. Data; Using System. Data. OracleClient; Using System. Configuration; Using System. Data. Common; Using System.