Store and reterive data in database

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  12 years ago

  by beratko83

  berat koçan

  , Turkey

  Joined 13 years ago

   Dear All,

  Now am fresher to enter Dotnet.I want to simple coding for how to store data in database? and How to reterive  stored data in database to output form? For example i want to create employee table.The following fields are contain the table(empid,empname,empaddress,etc).I want to Store data in a database and also i want to reterive stored data to output form
  

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  12 years ago

  by Ali Rizwan

  Ali Rizwan

  Lahore Punjab, Pakistan

  Joined 13 years ago

  Hi Arun

  you've left out several pieces of information. What dbms are you connecting to (Oracle,SQL Server,Access) so I'm not going to give the line by line breakdown for every one of them. Use the code I give to help you understand how the Active Data Object (ADO.Net) works.

  code is in VB.Net

  'I'm assuming you're using a SQL Server dbms

  'Case 1 --Retrieving a single value

  Using System.Data.SqlClient

  Dim sqlConn As New SqlClient.SqlConnection 'You need a connection

  Dim sqlComm As New SqlClient.SqlCommand 'You 're also going to need a command object

  Dim ValuetobeRetrieved As String

  sqlConn.ConnectionString = "" ' Whatever connection string you're using ie. Data Source=[MachineName];Initial Catalog=[dbName];Integrated Security=[True/False--True=your application has security rights,False=Username and Password has to be supplied for your application to connect]

  sqlComm.CommandText = "SELECT [ValueToBeRetrieved] FROM [db_Table] WHERE [Insert Filter criteria] "sqlComm.Connection = sqlConn ' Set the commands connection

  sqlConn.Open() 'Self explanatory

  ValuetobeRetrieved= sqlComm.ExecuteScalar()

  sqlConn.Close()

  NOTES: always ensure that your data typing in .Net matches the value type in SQL (String = String etc..)

  Also explore and discover the following

  Datareader,DataSets,DataGrid, DataGridView

  Unfortunately I've run out of time so I cannot continue with Case 2 retrieving and displaying multiple values (a full row in a table for example), but with research and a little curiosity you can discover that for yourself. Have fun!!

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