Connecting to the SQL Database

Hi all,

I am new to this field. I am trying to Connect to the database using the following code. The code does not give an error but gives an empty grid view.

Can somebody figure out the mistake?

protectedvoid Page_Load(object sender,EventArgs e)

{

if (!IsPostBack)

BindGridView();

}

void BindGridView()

{

System.Data.SqlClient.SqlConnection sqlconnect =new System.Data.SqlClient.SqlConnection("");//added connection string here

String command ="SELECT * from table";

System.Data.SqlClient.SqlCommand sqlcommand =new System.Data.SqlClient.SqlCommand();

sqlcommand.CommandText = command;

sqlcommand.Connection = sqlconnect;

System.Data.SqlClient.SqlDataAdapter da =new System.Data.SqlClient.SqlDataAdapter();

da.SelectCommand = sqlcommand;

DataSet ds =newDataSet();

sqlconnect.Open();

sqlcommand.ExecuteNonQuery();

da.Fill(ds);

GridView1.DataSource = ds;

GridView1.DataBind();

sqlconnect.Close();

}

First, make sure the SQL does return data by executing it like it query analyser or management studio.

Try this code in stead

System.Data.SqlClient.SqlConnection sqlconnect =new System.Data.SqlClient.SqlConnection("");//added connection string hereString command ="SELECT * from table";System.Data.SqlClient.SqlCommand sqlcommand =new System.Data.SqlClient.SqlCommand();sqlcommand.CommandText = command;sqlcommand.Connection = sqlconnect;System.Data.SqlClient.SqlDataAdapter da =new System.Data.SqlClient.SqlDataAdapter();da.SelectCommand = sqlcommand;DataSet ds =new DataSet();da.Fill(ds);GridView1.DataSource = ds;GridView1.DataBind();

|||

hi,

I have already checked the query in query builder and it works absolutely fine. The connection also works when i use the SQLDataSource control from the toolbox. However, it does not work with the code. Also, the code that you suggested gives the same output as before.

|||

Hi,

are you mapping the columns in dataview by manually or allow auto generated Columns.

System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(" ");
System.Data.DataSet ds = new System.Data.DataSet();
System.Data.SqlClient.SqlDataAdapter adapter = new System.Data.SqlClient.SqlDataAdapter();
conn.Open();
adapter.SelectCommand = new System.Data.SqlClient.SqlCommand("Select * From Table", conn);
adapter.Fill(ds, "Authors");
conn.Close();

GridView1.DataSource = ds;
GridView1.DataBind();

Hope this Work

|||

sjm:

I have already checked the query in query builder and it works absolutely fine. The connection also works when i use the SQLDataSource control from the toolbox. However, it does not work with the code. Also, the code that you suggested gives the same output as before.

The code should execute fine and as you say there are no errors.

Can you just break through and step over all the code just to make sure no exceptions are being thrown, and also inspect the dataset object after it has been filled to see if datatables/datarows exist in it.

|||

Hey

This does not work either. I've tried mapping the columns manually as well as Allowing auto generate, both don't give the required output.

Do i need to create a new table manually for allowing display of grid view?

if yes, how should i do that?

|||

sjm:

Do i need to create a new table manually for allowing display of grid view?

There is no need. The gridview can be bound to a dataset and it will auto generate the bound fields based on the datatable in the dataset.

Did you step through the code to make sure no errors and thrown and can inspect the dataset?

|||

place ur code in try catch block.

and also check ds.tables[0].rows.count by debug. is should return > 0.

|||

Thanks to all of you who replied...

I could solve the Problem...

The problem with the code was that the columns in the grid were not binded to the data.

I did that nd the code worked..

thank you.