renametable.aspx.cs

wrox c#高级编程

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using SqlAdmin;

namespace SqlWebAdmin
{
    /// <summary>
    /// Summary description for RenameTable.
    /// </summary>
    public class RenameTable : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.TextBox TableNameTextBox;
        protected System.Web.UI.WebControls.Button RenameButton;
        protected System.Web.UI.WebControls.Button CancelButton;
        protected System.Web.UI.WebControls.RequiredFieldValidator TableNameRequiredValidator;
        protected System.Web.UI.WebControls.Label ErrorCreatingLabel;


        public RenameTable()
        {
            Page.Init += new System.EventHandler(Page_Init);
        }

        private void Page_Load(object sender, System.EventArgs e)
        {
            ErrorCreatingLabel.Visible = false;

            HttpCookie cookie = Request.Cookies["WebDataAdministrator"];
            if (cookie == null)
                Response.Redirect("default.aspx?error=sessionexpired");


            if (!IsPostBack)
                TableNameTextBox.Text = Request["table"];
        }

        private void Page_Init(object sender, EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
        }

        #region Web Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.Load += new System.EventHandler(this.Page_Load);
            this.RenameButton.Click += new System.EventHandler(this.RenameButton_Click);
            this.CancelButton.Click += new System.EventHandler(this.CancelButton_Click);
        }
        #endregion


        private void RenameButton_Click(object sender, System.EventArgs e) {
            HttpCookie cookie = Request.Cookies["WebDataAdministrator"];
            if (cookie == null)
                Response.Redirect("default.aspx?error=sessionexpired");

            SqlServer server = new SqlServer(cookie.Values["server"], cookie.Values["username"], cookie.Values["password"]);

            server.Connect();

            SqlDatabase database = server.Databases[Request["database"]];
            if (database == null) {
                server.Disconnect();

                // Database doesn't exist - break out and go to error page
                Response.Redirect(String.Format("error.aspx?error={0}", 1000));
                return;
            }

            SqlTable table = database.Tables[Request["table"]];
            if (table == null) {
                server.Disconnect();

                // Table doesn't exist - break out and go to error page
                Response.Redirect(String.Format("error.aspx?error={0}", 1002));
                return;
            }

            // Rename the table
            try {
                table.Name = TableNameTextBox.Text;

                // If successful, disconnect
                server.Disconnect();

                // Redirect to info page
                Response.Redirect(String.Format("tables.aspx?database={0}", Server.UrlEncode(Request["database"])));
            }
            catch (Exception ex) {
                ErrorCreatingLabel.Visible = true;
                ErrorCreatingLabel.Text = "There was an error renaming the table:<br>" + Server.HtmlEncode(ex.Message).Replace("\n", "<br>");

                server.Disconnect();
            }
        }

        private void CancelButton_Click(object sender, System.EventArgs e) {
            // Redirect to info page
            Response.Redirect(String.Format("tables.aspx?database={0}", Server.UrlEncode(Request["database"])));
        }
    }
}