I'm trying to retrieve data from a database to a datagridview but i'm getting an exception,
The ConnectionString property has not been initialized.
using (conn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=""C:\Users\BOB\Documents\Visual Studio 2012\Projects\Login\Login\Student_Marks.mdf"";Integrated Security=True"));
{
using (adap = new SqlDataAdapter("select * from tbl_Students_Marks", conn))
{
DataSet das = new DataSet();
adap.Fill(das);
dataGridView1.DataSource = ds.Tables[0];
}
}
i see your code and found that you placed ";" and the end of your first using statement where you initiating conn
using (conn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=""C:\Users\BOB\Documents\Visual Studio 2012\Projects\Login\Login\Student_Marks.mdf"";Integrated Security=True"))//; this was the issue
{
using (adap = new SqlDataAdapter("select * from tbl_Students_Marks", conn))
{
DataSet das = new DataSet();
adap.Fill(das);
dataGridView1.DataSource = das.Tables[0];//this must be das not ds
}
}
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