App_Code/ExecuteSql.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;
using System.Collections;
using System.Web.SessionState;
/// <summary>
/// ExecuteSql 的摘要说明
/// </summary>
public class ExecuteSql
{
    SqlConnection conn;

    SqlTransaction transaction;

    public ExecuteSql()
    {

        conn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["connStr"].ToString());
    }

    
    /// <summary>
    /// 执行插入、修改、删除
    /// </summary>
    /// <param name="strSql"></param>
    /// <returns></returns>
    public int exeSQL(string strSql)
    {
        int val;

        if (conn.State == ConnectionState.Open)
            conn.Close();
        try
        {
            conn.Open();

            SqlCommand command = conn.CreateCommand();

            command.CommandText = strSql;

            val = (int)command.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            throw (ex);
        }

        return val;
    }

    public DataTable execSQLTable(string sql)
    {
        if (conn.State == ConnectionState.Open)