App_Code/DataBase.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

/// <summary>
/// DataBase 的摘要说明
/// </summary>
public class DataBase
{
	public DataBase()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public static string connstring = ConfigurationManager.ConnectionStrings["cstr"].ConnectionString;
    public static string begin;
    public static string end;
    public Boolean Exucute(string sql)
    {
        SqlConnection conn = new SqlConnection(connstring);
        SqlCommand myCommand = new SqlCommand(sql, conn);
        try
        {
            conn.Open();
            myCommand.ExecuteNonQuery();
            return true;
        }
        catch(Exception ex)
        {
            throw ex;
            return false;
        }
        finally
        {
            conn.Close();
        }
    }

    public DataSet Getdata(string sql)
    {
        SqlConnection conn = new SqlConnection(connstring);
        SqlCommand myCommand = new SqlCommand(sql, conn);
        try
        {
            conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(myCommand);
            DataSet ds = new DataSet();
            da.Fill(ds);
            return ds;
        }
        catch
        {