DAL/ContactInfoDAL.cs

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using System;
using System.Data;
using System.Text;
using System.Data.SqlClient;
using Maticsoft.DBUtility;//Please add references
namespace DAL
{
    /// <summary>
    /// 数据访问类:ContactInfoDAL
    /// </summary>
    public partial class ContactInfoDAL
    {
        public ContactInfoDAL()
        { }
        #region  Method

        /// <summary>
        /// 得到最大ID
        /// </summary>
        public int GetMaxId()
        {
            return DbHelperSQL.GetMaxID("ID", "ContactInfo");
        }

        /// <summary>
        /// 是否存在该记录
        /// </summary>
        public bool Exists(int ID)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from ContactInfo");
            strSql.Append(" where ID=@ID ");
            SqlParameter[] parameters = {
					new SqlParameter("@ID", SqlDbType.Int,4)};
            parameters[0].Value = ID;

            return DbHelperSQL.Exists(strSql.ToString(), parameters);
        }


        /// <summary>
        /// 增加一条数据
        /// </summary>
        public int Add(Models.ContactInfo model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into ContactInfo(");
            strSql.Append("ContactId,IsDelete,Account,ContactName,CommonMobile,HeadPortrait,AttFile,GroupId)");
            strSql.Append(" values (");
            strSql.Append("@ContactId,@IsDelete,@Account,@ContactName,@CommonMobile,@HeadPortrait,@AttFile,@GroupId)");
            strSql.Append(";select @@IDENTITY");
            SqlParameter[] parameters = {
					new SqlParameter("@ContactId", SqlDbType.NVarChar,128),
					new SqlParameter("@IsDelete", SqlDbType.Int,4),
					new SqlParameter("@Account", SqlDbType.NVarChar,64),
					new SqlParameter("@ContactName", SqlDbType.NVarChar,50),
					new SqlParameter("@CommonMobile", SqlDbType.NVarChar,50),
					new SqlParameter("@HeadPortrait", SqlDbType.NVarChar,256),
					new SqlParameter("@AttFile", SqlDbType.NVarChar,256),
					new SqlParameter("@GroupId", SqlDbType.Int,4)};