便于开发的Helper类

一、将config封装实体层；

例子config：

<?xml version="1.0" encoding="utf-8" ?>
<Settings>
  <CRMSettings>
    <UserName>administrator</UserName>
    <Password>Sh123456</Password>
    <Domain>SSO.COM</Domain>
    <ConnectionString>Data Source=.;Initial Catalog=XHMZJ_MSCRM;User ID=sa;password=Sh123456</ConnectionString>
  </CRMSettings>
  <DataSourceSettings>
    <ConnectionString>Data Source=.;Initial Catalog=XH_YWXT;User ID=sa;password=Sh123456</ConnectionString>
  </DataSourceSettings>
</Settings>

1.对于web版本的web.config。

 public class ConfigHelper
    {
        private static ConfigHelper _instance = null;
        public static ConfigHelper Instance
        {
            get
            {
                if (_instance == null)
                    _instance = new ConfigHelper();
                return _instance;
            }
        }
        public ConfigHelper()
        {
            this.CRMConfigInstance = new CRMConfig();
            Exception Ex = null;
            try
            {

                this.CRMConfigInstance.ServerURL = System.Configuration.ConfigurationManager.AppSettings["WebUrl"];
                this.CRMConfigInstance.UserName = System.Configuration.ConfigurationManager.AppSettings["UserName"];
                this.CRMConfigInstance.Password = System.Configuration.ConfigurationManager.AppSettings["Password"];
                this.CRMConfigInstance.Domain = System.Configuration.ConfigurationManager.AppSettings["Domain"];
                this.CRMConfigInstance.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["MZJCRM"].ConnectionString;

            }
            catch (Exception ex)
            {
                Ex = ex;
            }
            finally
            {
                if (Ex != null)
                {
                    //ExceptionHelper.WriteLog(Ex);
                }
            }
        }
        public CRMConfig CRMConfigInstance = null;

    }

    public class CRMConfig
    {

        private string _ConnectionString;
        public string ConnectionString
        {
            set { _ConnectionString = value; }
            get { return _ConnectionString; }
        }

        #region CRMConfig
        private string _serverURL;
        public string ServerURL
        {
            set { _serverURL = value; }
            get { return _serverURL; }
        }

        private string _userName;
        public string UserName
        {
            set { _userName = value; }
            get { return _userName; }
        }
        private string _password;
        public string Password
        {
            set { _password = value; }
            get { return _password; }
        }
        private string _domain;
        public string Domain
        {
            set { _domain = value; }
            get { return _domain; }
        }
        #endregion
    }

Web版本

2.应用程序版本的config。

public class ConfigHelper
    {
        private static ConfigHelper _instance = null;
        public static ConfigHelper Instance
        {
            get
            {
                if (_instance == null)
                    _instance = new ConfigHelper();
                return _instance;
            }
        }
        const string configFileName = "CRMConfig.xml";
        protected XmlDocument doc;
        public ConfigHelper()
        {
            this.CRMConfigInstance = new CRMConfig();
            this.SourceConfigInstance = new SourceConfig();

            doc = new XmlDocument();
            Exception Ex = null;
            try
            {
                doc.Load(this.FileFullPath);
                XmlNode Settings = doc.DocumentElement.SelectSingleNode("Settings");
                //CRMSettings
                XmlNode CrmSettings = doc.DocumentElement.SelectSingleNode("CRMSettings");
                XmlNode WebUrl = CrmSettings.SelectSingleNode(@"WebUrl");
                XmlNode UserName = CrmSettings.SelectSingleNode(@"UserName");
                XmlNode Password = CrmSettings.SelectSingleNode(@"Password");
                XmlNode Domain = CrmSettings.SelectSingleNode(@"Domain");
                XmlNode CRMConnectionString = CrmSettings.SelectSingleNode(@"ConnectionString");
                //DataSourceSettings
                XmlNode DataSourceSettings = doc.DocumentElement.SelectSingleNode("DataSourceSettings");
                XmlNode SourceConnectionString = DataSourceSettings.SelectSingleNode(@"ConnectionString");

                this.CRMConfigInstance.UserName = UserName.InnerText;
                this.CRMConfigInstance.Password = Password.InnerText;
                this.CRMConfigInstance.Domain = Domain.InnerText;
                this.CRMConfigInstance.ServerURL = WebUrl.InnerText;
                this.CRMConfigInstance.ConnectionString = CRMConnectionString.InnerText;

                this.SourceConfigInstance.ConnectionString = SourceConnectionString.InnerText;

            }
            catch(Exception ex)
            {
                Ex = ex;
            }
            finally
            {
                if(Ex != null)
                {
                    ExceptionHelper.WriteLog(Ex);
                }
            }
        }

        private string _filePath;
        public string FilePath
        {
            set { this._filePath = value; }
            get
            {
                return System.Windows.Forms.Application.StartupPath;
            }
        }
        /// <summary>
        /// full path
        /// </summary>
        public string FileFullPath
        {
            get
            {
                return System.IO.Path.Combine(this.FilePath, configFileName);
            }
        }

        public CRMConfig CRMConfigInstance = null;
        public SourceConfig SourceConfigInstance = null;

    }

    public class CRMConfig
    {

        private string _ConnectionString;
        public string ConnectionString
        {
            set { _ConnectionString = value; }
            get { return _ConnectionString; }
        }

        #region CRMConfig
        private string _serverURL;
        public string ServerURL
        {
            set { _serverURL = value; }
            get { return _serverURL; }
        }

        private string _userName;
        public string UserName
        {
            set { _userName = value; }
            get { return _userName; }
        }
        private string _password;
        public string Password
        {
            set { _password = value; }
            get { return _password; }
        }
        private string _domain;
        public string Domain
        {
            set { _domain = value; }
            get { return _domain; }
        }
        #endregion
    }
    public class SourceConfig
    {
        private string _ConnectionString;
        public string ConnectionString
        {
            set { _ConnectionString = value; }
            get { return _ConnectionString; }
        }
    }

应用程序版本

二、SqlHeleper类

   public static class SQLHelper
     {
         public static DataTable GetDataTable(string sqlStr, params SqlParameter[] sqlParameters)
         {
             using (SqlConnection conn = new SqlConnection(ConfigHelper.Instance.CRMConfigInstance.ConnectionString))
             {
                 conn.Open();
                 using (SqlCommand cmd = conn.CreateCommand())
                 {
                     cmd.CommandText = sqlStr;
                     foreach (SqlParameter sqlParameter in sqlParameters)
                     {
                         cmd.Parameters.Add(sqlParameter);
                     }
                     DataSet dataSet = new DataSet();
                     SqlDataAdapter adapter = new SqlDataAdapter(cmd);
                     adapter.Fill(dataSet);
                     return dataSet.Tables[];
                 }
             }
         }

         public static string XMLDocumentToString(ref   XmlDocument doc)
         {
             MemoryStream stream = new MemoryStream();
             XmlTextWriter writer = new XmlTextWriter(stream, null);
             writer.Formatting = Formatting.Indented;
             doc.Save(writer); //转换

             StreamReader sr = new StreamReader(stream, System.Text.Encoding.UTF8);
             stream.Position = ;
             string xmlString = sr.ReadToEnd();
             sr.Close();
             stream.Close();

             return xmlString;
         }

         public static int ExecuteNonQuerys(string SQL, params SqlParameter[] commandParameters)
         {
             SqlCommand cmd = new SqlCommand();

             using (SqlConnection connection = new SqlConnection(ConfigHelper.Instance.CRMConfigInstance.ConnectionString))
             {
                 PrepareCommand(cmd, connection, null, CommandType.Text, SQL, commandParameters);
                 int val = cmd.ExecuteNonQuery();

                 cmd.Parameters.Clear();
                 return val;
             }
         }

         private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
         {

             //判断数据库连接状态
             if (conn.State != ConnectionState.Open)
                 conn.Open();

             cmd.Connection = conn;
             cmd.CommandText = cmdText;

             //判断是否需要事物处理
             if (trans != null)
                 cmd.Transaction = trans;

             cmd.CommandType = cmdType;

             if (cmdParms != null)
             {
                 foreach (SqlParameter parm in cmdParms)
                     cmd.Parameters.Add(parm);
             }
         }
     }

SqlHelper