tableadapter

Create a new Web site project, 1. Setting up a database From Server Explorer, add a new connection to the data connection and use the Microsoft Access database file as the data provider to connect to the database for the use case of the Crystal Reports Xtreme 2. Create a new Crystal Reports report Add a Crystal Reports report to the project with the name Cr1.rpt. 3. Add XML Schema file Add an XML schema file to the project because the XML schema file itself is also an XML file, named Order

);OdbcDataReader reader = cmd. ExecuteReader ();while (reader. Read ()) {Console.Write (reader. GetString (0) + ",");Console.Write (reader. GetString (1) + ",");}Conn. Close ();Console.read ();Reference:Http://jingyan.baidu.com/article/60ccbceb018f4d64cab19787.html". NET Data Provider"SetupVisual Studio (Visual Studio 2010) appends Fujitsu Npgsql. Net Data Provider;1. Windows program: "Project" menu select "Append Options",Web program: "Web Site" menu select "Append option";2. ". Net" tab "Compo

Tags: winform ar for SP file Data Art BS AD1. New WinForm Project, add "New Item", select DataSet, open *.xsd file, right click in interface, add "TableAdapter", right click on link Database (*.mdb) in new control, add SQL statement. Compilation Engineering (F6)2. Open the dialog box, select the toolbar, open the project name custom control in the toolbar, drag the dataset control, Departmentstableadapter control into the dialog box, and add it in the

, etc.). Note that the VS 2005 built-in Tableadapter/dataset Designer automatically uses this mechanism, as are the ASP. NET 2.0 data source controls.A common error perception (misperception) is that if you use a stored procedure or ORM, you are completely protected from SQL injection attacks. This is not true, and you still need to be sure that you are cautious when passing data to a stored procedure, or that you are doing it safely when you use ORM

It was found on the Internet. Occasionally, a strongly typed TableAdapter update (table) method always complains (ora-01745:invalid host/bind variable name). --Invalid host/assignment variable name error. Most of the answers you find online are this: Ora-01745:invalid host/bind Variable NameCause:a Colon in A bind variable or into specification is followed by a inappropriate name, perhaps A Reserved word.Action:change the variable name and retry t

example, missing a ProductName value throws a NoNullAllowedException exception because the ProductName property of the Prodcutsrow class sets its AllowDBNull property to False If the database is not functioning correctly, a SqlException exception is thrown through TableAdapter when attempting to connect to the database. Without any action, these exceptions will emerge from the data access layer to the business logic layer, then to the ASP.net page, a

box countryname are blank. The GridView control still invokes the ObjectDataSource select method, but a null value is passed into the Getsuppliersbycountry (country) method. The table adapter (TableAdapter) converts this null value into a null value in the database (DBNull.Value), whereas Getsuppliersbycountry (country) The query used by the method already shows that no results will be returned when a null value dislocation parameter @categoryid is p

problems (such as incorrectly converting numeric types, etc.). Note that the VS 2005 built-in Tableadapter/dataset Designer automatically uses this mechanism, as are the ASP. NET 2.0 data source controls.A common error perception (misperception) is that if you use a stored procedure or ORM, you are completely protected from SQL injection attacks. This is not true, and you still need to be sure that you are cautious when passing data to a stored proce

Transfer from http://www.knowsky.com/339881.htmlThe wildcard usage for like in Access is:“?” Represents any single character; "*" means 0 or more characters; "#" means any numberSo it should be:SELECT * from DatabaseName where fieldname like ' *xx* 'Originally in SQL SERVER is a percent, in access is the * * number, no wonder you can not find data!But if in the VS2005 TableAdapter again with the percent, with * not!!!——————————————————————————————————