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how to delete from code behind

Posted on 2006-06-19
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Last Modified: 2008-03-03
How would I write a function to delete from a sql table in the code behind?

Would this work?

protected void DeleteRecordByID(string EMail)
{
String objConnection = ConfigurationManager.ConnectionStrings["MyConnection"].ToString();
String strSQL = "Delete from dbname.dbo.tblname where email ='" + EMail + "'";
SqlDataAdapter objAdapter = new SqlDataAdapter(strSQL, objConnection);
DataSet dataSet = new DataSet();
objAdapter.Fill(dataSet, "elist");
}
0
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Question by:fwsteal
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3 Comments
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 16934999
It would but its a bit overkill.

protected void DeleteRecordByID(string EMail)
{
    String objConnection = ConfigurationManager.ConnectionStrings["MyConnection"].ToString();
    String strSQL = "Delete from dbname.dbo.tblname where email ='" + EMail + "'";

    SqlCommand cmd = new SqlCommand(strSQL, objConnection);
    objConnection.Open();

    cmd.ExecuteNonQuery();

    cn.Close();
}
0
 

Author Comment

by:fwsteal
ID: 16935231
i got errors on:

SqlCommand cmd = new SqlCommand(strSQL, objConnection);
1. The best overloaded method match for 'System.Data.SqlClient.SqlCommand.SqlCommand(string, System.Data.SqlClient.SqlConnection)' has some invalid arguments
2. Argument '2': cannot convert from 'string' to 'System.Data.SqlClient.SqlConnection'

objConnection.Open();
'string' does not contain a definition for 'Open'

objConnection.Close();
'string' does not contain a definition for 'Close'

0
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 2000 total points
ID: 16935253
oops, didn't read your code properly. It was the "obj" prefix on your connection string that threw me:

protected void DeleteRecordByID(string EMail)
{
    String strConnection = ConfigurationManager.ConnectionStrings["MyConnection"].ToString();
    String strSQL = "Delete from dbname.dbo.tblname where email ='" + EMail + "'";

    SqlConnection objConnection = new SqlConnection(strConnection);
    SqlCommand cmd = new SqlCommand(strSQL, objConnection);
    objConnection.Open();

    cmd.ExecuteNonQuery();

    objConnection.Close();
}
0

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