Create-OdbcCommand-and-execute-it-C


            <%@ Page Language="C#" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.Odbc" %>

    void Page_Load(object sender, EventArgs e) {
        if (!Page.IsPostBack)
        {
            string ConnectionString = ConfigurationSettings.AppSettings["MySQLConnectString"];
            OdbcConnection myConnection = new OdbcConnection(ConnectionString);
    
            try{
                string CommandTextPublisher = "SELECT PublisherID, PublisherName FROM Publisher";
                OdbcCommand myCommandPublishers = new OdbcCommand(CommandTextPublisher, myConnection);
    
                myConnection.Open();
    
                DropDownList1.DataSource = myCommandPublishers.ExecuteReader();
                DropDownList1.DataTextField = "PublisherName";
                DropDownList1.DataValueField = "PublisherID";
                DropDownList1.DataBind();
                DropDownList1.Items.Insert(0, new ListItem("-- All Publishers --", "0"));
            } catch (Exception ex){
                throw(ex);
            } finally{
                myConnection.Close();
            }
        }
    }
    
    void ApplyFilter_Click(Object sender, EventArgs e) {
        string ConnectionString = ConfigurationSettings.AppSettings["MySQLConnectString"];
        OdbcConnection myConnection = new OdbcConnection(ConnectionString);
    
        try{
            string CommandTextBooks = "SELECT Book.BookTitle, Publisher.PublisherName FROM Book INNER JOIN Publisher on Book.BookPublisherID = Publisher.PublisherID";
            string filterValue = DropDownList1.SelectedValue;
            if (filterValue != "0")
                CommandTextBooks += " WHERE Book.BookPublisherID = " + filterValue;
            CommandTextBooks+=" ORDER BY Book.BookTitle";
            OdbcCommand myCommandBooks = new OdbcCommand(CommandTextBooks, myConnection);
            myConnection.Open();
            DataGrid1.DataSource = myCommandBooks.ExecuteReader();
            DataGrid1.DataBind();
        } catch (Exception ex){
            throw(ex);
        } finally{
            myConnection.Close();
        }
    }





    
        
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File: Web.config
ADO Net Database ASP.Net Tutorial
