How to execute stored procedure from code behind file?

Experienced programmers prefer to use stored procedures in place of inline SQL Query. There are several advantages of using stored procedure. First of all stored procedure provides security & it helps to improve performance. Once a stored procedure execute it cached on the server. Stored procedure are easy to maintain & debug like a separate unit. Stored procedure can be tested independent of the application. In this session let us show you in Microsoft Technology VB.NET how to execute a stored procedure from the Code behind file.

In the below example I am using the stored procedure “USP_SearchLogo”. This stored procedure accepts 4 parameters. To execute this stored procedure here I am creating a new instance (SearchLogoCmd) of SqlCommand object by passing the stored procedure name & connection details (Connection String). Then to make compiler know that we are using stored procedure in command object in place of SQL Query, I defined command type to StoredProcedure. Now I need to pass parameter values before execute the procedure. To do that I am using SearchLogoCmd.Parameters.Add method. In this method I am passing parameter name with the data type depending upon the Stored procedure. Finally executing the Command object using ExecuteReader.

Example:

Dim SearchLogoCmd As New SqlCommand("USP_SearchLogo", sqlConn)

SearchLogoCmd.CommandType = CommandType.StoredProcedure

SearchLogoCmd.Parameters.Add("@NativeFlag", SqlDbType.NVarChar).Value = Request("NativeFlag")
SearchLogoCmd.Parameters.Add("@LogoName", SqlDbType.NVarChar).Value = Trim(txtLogoName.Text)
SearchLogoCmd.Parameters.Add("@LogoFileName", SqlDbType.NVarChar).Value = Trim(txtFileName.Text)
SearchLogoCmd.Parameters.Add("@Status", SqlDbType.NVarChar).Value = ddlStatus.SelectedValue

Try
sqlConn.Open()
ds = ConvertDataReaderToDataSet(SearchLogoCmd.ExecuteReader())

grdImageFiles.DataSource = ds
grdImageFiles.DataBind()

Catch ex As Exception
Response.Write(ex.ToString())
Finally
sqlConn.Close()
End Try

You may noticed here I used a function ConvertDataReaderToDataSet(). This is because of here my Stored procedure returns reader specific data. To bind those data to my gridview “grdImageFiles” using a DataSet I used this function.

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