Read scalar data by using SqlCommand : SqlCommand « ADO.net Database « ASP.NET Tutorial

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ASP.NET Tutorial » ADO.net Database » SqlCommand 
18. 3. 5. Read scalar data by using SqlCommand
<%@ Page Language="C#" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.SqlClient" %>
<script runat="server">

    void Page_Load(object sender, EventArgs e) {
        string ConnectionString = ConfigurationSettings.AppSettings["MSDEConnectString"];
        string CommandText = "select PublisherID, PublisherName, PublisherCity, PublisherWebsite FROM Publisher ORDER BY PublisherID";
    
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        SqlCommand myCommand = new SqlCommand(CommandText, myConnection);
    
        myConnection.Open();
    
        string CommandTextCount = "SELECT COUNT(*) FROM Publisher";
        SqlCommand myCommandCount = new SqlCommand(CommandTextCount, myConnection);
    
        lblTotal.Text = Convert.ToString(myCommandCount.ExecuteScalar());
    
        DataGrid1.DataSource = myCommand.ExecuteReader(CommandBehavior.CloseConnection);
        DataGrid1.DataBind();
    }

</script>
<html>
<head>
</head>
<body>
    <asp:Label id="lblTotal" runat="server"></asp:Label>
    <form runat="server">
        <asp:datagrid id="DataGrid1" runat="server" EnableViewState="False">
            <HeaderStyle font-bold="True" forecolor="white" backcolor="#4A3C8C"></HeaderStyle>
            <ItemStyle backcolor="#DEDFDE"></ItemStyle>
        </asp:datagrid>
    </form>
</body>
</html>

File: Web.config

<configuration>
    <appSettings>
        <add key="MSDEConnectString" value="server=(local)\YourDatabase;database=Books;uid=YourID;pwd=letmein;" />
    </appSettings>
</configuration>
18. 3. SqlCommand
18. 3. 1. Create SqlCommand from sql statement and connection
18. 3. 2. Executing a Command
18. 3. 3. Executing a Command with Parameters
18. 3. 4. Returning a Single Value
18. 3. 5. Read scalar data by using SqlCommand
18. 3. 6. Execute insert command by using SqlCommand
18. 3. 7. Execuate select command by using the SqlCommand
18. 3. 8. Execute update command
18. 3. 9. Attach SqlCommand to DataGrid
18. 3. 10. Pass a CommandBehavior.CloseConnection parameter to the ExecuteReader() method.
18. 3. 11. Executing Asynchronous Database Commands
18. 3. 12. Avoid SQL injection
18. 3. 13. Avoid SQL Injection attack
18. 3. 14. Browser Snoop
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