Question

I have a gridView in asp, currently using the following datasource –

<asp:SqlDataSource ID="SqlDataSourceTEST" runat="server" 
    ConnectionString="connection string" 
    SelectCommand="SELECT * FROM table">
</asp:SqlDataSource>

I can adjust the SelectCommand in the code behind by doing –

SqlDataSourceTEST.SelectCommand = "SELECT * FROM table WHERE ID =" + iD;

However I am now adjusting the code to populate the gridView through a web service method –

[WebMethod]

    public DataSet sMethod()
    {
        using (SqlConnection cnn = new SqlConnection(DBcon))
        {

            string sql = "SELECT * FROM table";
            SqlDataAdapter da = new SqlDataAdapter(sql, cnn);
            DataSet ds = new DataSet();
            da.Fill(ds, "table");

            return ds;

        }
    }

Then on page load populating the gridView –

WebService1 ws = new WebService1();
gridView1.DataSource = ws.sMethod();
gridView1.DataBind();

Is there a way I can adjust the string sql part of the web method in the code behind to add variables?

Answer 1

Make your WebMethod accept parameter:

public DataSet sMethod(string sql)
{
   if (string.IsNullOrEmpty(sql))
   {
       sql = "SELECT * FROM table";
   } 
   SqlDataAdapter da = new SqlDataAdapter(sql, cnn);

   ...
}

and call it from website:

string sql = "SELECT * FROM table WHERE ID =" + iD;
WebService1 ws = new WebService1();
gridView1.DataSource = ws.sMethod(sql);
gridView1.DataBind();