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DataSource controls in .NET

DataSource controls in .NET. How to access databases. Where is that database?. The physical database might be in many places On another server IP address + port number required On the same server, as the ASP.NET application

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DataSource controls in .NET

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  1. DataSource controls in .NET How to access databases

  2. Where is that database? • The physical database might be in many places • On another server • IP address + port number required • On the same server, as the ASP.NET application • If you work with a Microsoft SQL Server database put the database file (somename.mdf) in an APP_DATA folder in your ASP.NET project Data source controls in .NET

  3. DataSource Controls • A DataSource control has access to a database • AccessDataSource control • Access to a Microsoft Access Database • SqlDataSource control • Access to a Microsoft SQL Server database • Oracle • http://www.oracle.com/technetwork/topics/dotnet/index-085163.html • MySQL • http://www.mysql.com/downloads/connector/net/ • http://dev.mysql.com/tech-resources/articles/dotnet/ Data source controls in .NET

  4. Asp:SqlDataSourceexamles <asp:SqlDataSource ID="SqlDataSource1" runat="server“ SelectCommand="select * from member" ConnectionString="Data Source=(local)\SQLEXPRESS; Initial Catalog=myfirst; Integrated Security=SSPI;"> </asp:SqlDataSource> <asp:SqlDataSource ID="SqlDataSource2“ runat="server" SelectCommand="select * from member" ConnectionString="Data Source=(local)\SQLEXPRESS; UserId=anders; Password=Secret12;"> </asp:SqlDataSource> (local) is sometimeswritten . (”dot”) Data source controls in .NET

  5. Connection string • Information needed to connect to the database • DataSource=ServerName\ServerInstance • Server name can be • . • (local) • Localhost • 127.0.0.1 didn’t work for me • The name of the server machine • Server instance • Necessary if you have more than one instance of SQL Server on the server machine • Example: SQLEXPRESS • Catalog=myfirst • The name of the database to connect to • Security • Integrated Security: Use Windows authentication • Provide Username/password • More information • http://www.connectionstrings.com/sql-server-2008 Data source controls in .NET

  6. Connectionstring in web.config <configuration> <connectionStrings> … <add name="myfirstConnectionString" connectionString="Data Source=(local)\SQLEXPRESS;Initial Catalog=myfirst; Integrated Security=SSPI;" providerName="System.Data.SqlClient" /> </connectionStrings> <asp:SqlDataSource ID="SqlDataSource4" runat="server" SelectCommand="SELECT * FROM [member]" ConnectionString="<%$ ConnectionStrings:myfirstConnectionString%>"> </asp:SqlDataSource> Data source controls in .NET

  7. Data Source Mode Property • <asp:SqlDataSource… DataSourceMode=… > • DataSourceModecan have twovalues • DataSet • Read-Write, forward/backwards • Default value for the DataSourceModeproperty • Allowsfiltering, sorting, and paging • DataReader • Read-only, forward-only • Fastest, most effecient Data source controls in .NET

  8. Filtering data usingSelectParameters <asp:SqlDataSource ID="SqlDataSource3" runat="server" SelectCommand="select * from member where memberID=@memberID“ ConnectionString="Data Source=(local)\SQLEXPRESS; Initial Catalog=myfirst; Integrated Security=SSPI;"> <SelectParameters> <asp:QueryStringParameterName="memberID" QueryStringField="memberID" Type="String" /> </SelectParameters> </asp:SqlDataSource> Data source controls in .NET

  9. References • George Shepherd ASP.NET 4 Step by Step, Microsoft Press 2010 • Chapter 10 Data Binding, page 221-226 • Imar Spaanjaars Beginning ASP.NET 4 in C# and VB, Wrox/Wiley 2010 • Appendix B Configuring SQL Server 2008, page 757-775 • Bill EvjenProfessional ASP.NET 4 in C# and VB, Wrox/Wiley 2010 • Chapter 7 Data Binding, page 237-253 • MSDN AccessDataSourceclass • http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.accessdatasource.aspx • MSDN SqlDataSourceclass • http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.sqldatasource.aspx Data source controls in .NET

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