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Dapper 基本使用

项目右键 Manage NuGet Packages for Solution

搜索Dapper -> Install

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using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
 
namespace Dapper.Repository
{
    public class DapperDemo
    {
        public static string ConnectionString
        {
            get
            {
                string _connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();
                return _connectionString;
            }
        }
 
        public SqlConnection OpenConnection()
        {
            SqlConnection connection = new SqlConnection(ConnectionString);
            connection.Open();
            return connection;
        }
 
        /// <summary>
        /// 添加
        /// </summary>
        /// <returns></returns>
        public bool Add()
        {
            int row = 0;
            ED_Data model = new ED_Data();
            model.TableName = "123";
            model.DataKey = "123";
            model.FieldName = "123";
            model.Value = "123";
            model.Reference = "123";
            model.Branch = 1;
            model.InActive = false;
            model.Updated = DateTime.Now;
 
            string query = "INSERT INTO ED_Data(TableName,DataKey,FieldName,Value,Reference,Branch,InActive,Updated) VALUES (@TableName,@DataKey,@FieldName,@Value,@Reference,@Branch,@InActive,@Updated)";
            using (IDbConnection conn = OpenConnection())
            {
                row = conn.Execute(query, model);
            }
            if (row > 0)
                return true;
            else
                return false;
        }
 
        /// <summary>
        /// 修改
        /// </summary>
        /// <returns></returns>
        public int Update()
        {
            int row = 0;
            ED_Data model = new ED_Data();
            model.TableName = "123";
            model.DataKey = "123";
            model.Updated = DateTime.Now;
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "UPDATE ED_Data SET DataKey=@DataKey,Updated=@Updated WHERE TableName=@TableName";
                row = conn.Execute(query, model);
            }
            return row;
        }
 
        /// <summary>
        /// 删除
        /// </summary>
        /// <returns></returns>
        public int Delete()
        {
            int row = 0;
            ED_Data model = new ED_Data();
            model.TableName = "123";
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "DELETE FROM ED_Data WHERE TableName=@TableName";
                row = conn.Execute(query, model);
            }
            return row;
        }
 
        /// <summary>
        /// 查询一条数据
        /// </summary>
        /// <param name="columnCatId"></param>
        /// <returns>ED_Data</returns>
        public ED_Data GetModel(string TableName)
        {
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "SELECT * FROM ED_Data WHERE TableName = @TableName";
                return conn.Query<ED_Data>(query, new { tableName = TableName }).SingleOrDefault<ED_Data>();
            }
        }
 
        /// <summary>
        /// 查询list集合
        /// </summary>
        /// <returns>List</returns>
        public List<ED_Data> GetED_DataList()
        {
            using (IDbConnection conn = OpenConnection())
            {
                const string query = "SELECT * FROM ED_Data";
                return conn.Query<ED_Data>(query, null).ToList();
            }
        }
 
        /// <summary>
        /// 事务处理
        /// 删除
        /// </summary>
        /// <param name="cat"></param>
        /// <returns></returns>
        public int DeleteColumnCatAndColumn(ED_Data cat)
        {
            try
            {
                using (IDbConnection conn = OpenConnection())
                {
                    string delete1 = "DELETE FROM ED_Data WHERE TableName=@TableName";
                    string delete2 = "DELETE FROM ED_Data WHERE TableName=@TableName";
 
                    IDbTransaction transaction = conn.BeginTransaction();
                    int row = conn.Execute(delete1, new { TableName = cat.TableName }, transaction, null, null);
                    row += conn.Execute(delete2, new { TableName = cat.TableName }, transaction, null, null);
                    transaction.Commit();
                    return row;
                }
            }
            catch (Exception)
            {
                throw;
            }
        }
        
        /// <summary>
        /// 执行存储过程
        /// </summary>
        public void ExecuteStoredProcedure()
        {
            try
            {
                DynamicParameters para = new DynamicParameters();
                para.Add("@param1", 1);
                para.Add("@param2", 2);
 
                using (IDbConnection conn = OpenConnection())
                {
                    int row = conn.Execute("存储过程名称", para, null, null, CommandType.StoredProcedure);
                }
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        /// 批量添加
        /// </summary>
        public void InsertBatch()
        {
            try
            {
                string sqlStr = "INSERT INTO ED_Data(TableName,DataKey,FieldName,Value,Reference,Branch,InActive,Updated) VALUES (@TableName,@DataKey,@FieldName,@Value,@Reference,@Branch,@InActive,@Updated)";
                using (IDbConnection conn = OpenConnection())
                {
                    conn.Execute(sqlStr, new[]
                    {
                        new { TableName = "user1", DataKey = "a", FieldName = "name", Value = "000001", Reference = "", Branch = "", InActive = "", Updated = DateTime.Now },
                        new { TableName = "user2", DataKey = "b", FieldName = "age", Value = "000002", Reference = "", Branch= "", InActive = "", Updated = DateTime.Now },
                        new { TableName = "user3", DataKey = "c", FieldName = "phone", Value = "000003", Reference= "", Branch= "", InActive= "", Updated= DateTime.Now },
                    }, null, null, null);
                }
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}

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using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
 
namespace Dapper.Repository
{
    public class ED_Data
    {
        public string TableName { get; set; }
 
        public string DataKey { get; set; }
 
        public string FieldName { get; set; }
 
        public string Value { get; set; }
 
        public string Reference { get; set; }
 
        public int Branch { get; set; }
 
        public bool InActive { get; set; }
 
        public DateTime Updated { get; set; }
    }
}

Base基类

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using Dapper.CoreLibrary;
using Dapper.Entity;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Transactions;
 
namespace Dapper.Repository
{
    public abstract class RepositoryBase<T> : DbConnectionFactory, IRepositoryBase<T> where T : IEntityBase<T>
    {
        public RepositoryBase(IDbConnection db)
            : base(db)
        { }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public virtual int Add(T model)
        {
            int result = 0;
            try
            {
                var ps = model.GetType().GetProperties();
                List<string> @colms = new List<string>();
                List<string> @params = new List<string>();
                foreach (var p in ps)
                {
                    if (!p.CustomAttributes.Any(x => x.AttributeType == typeof(PrimaryKeyAttribute)) && !p.CustomAttributes.Any(x => x.AttributeType == typeof(DBIgnoreAttribute)))
                    {
                        @colms.Add(string.Format("[{0}]", p.Name));
                        @params.Add(string.Format("@{0}", p.Name));
                    }
                }
                var sql = string.Format("INSERT INTO [{0}] ({1}) VALUES({2}); SELECT @@IDENTITY;", typeof(T).Name, string.Join(", ", @colms), string.Join(", ", @params));
                result = _conn.ExecuteScalar<int>(sql, model);
            }
            catch (Exception ex)
            {
                throw;
            }
            return result;
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="listModel"></param>
        public virtual void Add(List<T> listModel)
        {
            try
            {
                using (var scope = new TransactionScope())
                {
                    listModel.ForEach(model =>
                    {
                        var ps = model.GetType().GetProperties();
                        List<string> @colms = new List<string>();
                        List<string> @params = new List<string>();
                        foreach (var p in ps)
                        {
                            if (!p.CustomAttributes.Any(x => x.AttributeType == typeof(PrimaryKeyAttribute)) && !p.CustomAttributes.Any(x => x.AttributeType == typeof(DBIgnoreAttribute)))
                            {
                                @colms.Add(string.Format("[{0}]", p.Name));
                                @params.Add(string.Format("@{0}", p.Name));
                            }
                        }
                        var sql = string.Format("INSERT INTO [{0}] ({1}) VALUES({2}); SELECT @@IDENTITY;", typeof(T).Name, string.Join(", ", @colms), string.Join(", ", @params));
                        _conn.ExecuteScalar<int>(sql, model);
                    });
                    scope.Complete();
                }
            }
            catch (Exception ex)
            {
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public virtual int AddWithGuid(T model)
        {
            int result = 0;
            try
            {
                var ps = model.GetType().GetProperties();
                List<string> @colms = new List<string>();
                List<string> @params = new List<string>();
                foreach (var p in ps)
                {
                    if (!p.CustomAttributes.Any(x => x.AttributeType == typeof(DBIgnoreAttribute)))
                    {
                        @colms.Add(string.Format("[{0}]", p.Name));
                        @params.Add(string.Format("@{0}", p.Name));
                    }
                }
                var sql = string.Format("INSERT INTO [{0}] ({1}) VALUES({2});", typeof(T).Name, string.Join(", ", @colms), string.Join(", ", @params));
                result = _conn.Execute(sql, model);
            }
            catch (Exception ex)
            {
                throw;
            }
            return result;
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="model"></param>
        public virtual void Update(T model)
        {
            PropertyInfo pkInfo = null;
            var ps = model.GetType().GetProperties();
            List<string> @params = new List<string>();
            foreach (var p in ps)
            {
                if (p.CustomAttributes.Any(x => x.AttributeType == typeof(DBIgnoreAttribute)))
                {
                    continue;
                }
                if (p.CustomAttributes.Any(x => x.AttributeType == typeof(PrimaryKeyAttribute)))
                {
                    pkInfo = p;
                }
                else
                {
                    @params.Add(string.Format("[{0}]=@{0}", p.Name));
                }
            }
            var sql = string.Format("UPDATE [{0}] SET {1} WHERE [{2}] = @{2}", typeof(T).Name, string.Join(", ", @params), pkInfo.Name);
            _conn.Execute(sql, model);
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="listModel"></param>
        public virtual void Update(List<T> listModel)
        {
            using (var scope = new TransactionScope())
            {
                listModel.ForEach(model =>
                {
                    PropertyInfo pkInfo = null;
                    var ps = model.GetType().GetProperties();
                    List<string> @params = new List<string>();
                    foreach (var p in ps)
                    {
                        if (p.CustomAttributes.Any(x => x.AttributeType == typeof(DBIgnoreAttribute)))
                        {
                            continue;
                        }
                        if (p.CustomAttributes.Any(x => x.AttributeType == typeof(PrimaryKeyAttribute)))
                        {
                            pkInfo = p;
                        }
                        else
                        {
                            @params.Add(string.Format("[{0}] = @{0}", p.Name));
                        }
                    }
                    var sql = string.Format("UPDATE [{0}] SET {1} WHERE [{2}] = @{2}", typeof(T).Name, string.Join(", ", @params), pkInfo.Name);
                    _conn.Execute(sql, model);
                });
                scope.Complete();
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="primaryValue">主键ID</param>
        /// <param name="tableName">表名</param>
        /// <returns></returns>
        public virtual T GetModel(string primaryValue, string tableName = "")
        {
            try
            {
                string primaryWhere = string.Empty;
                var ps = typeof(T).GetProperties();
                if (string.IsNullOrEmpty(tableName))
                {
                    tableName = typeof(T).Name;
                }
                var primary = ps.Single(p => p.CustomAttributes.FirstOrDefault(c => c.AttributeType == typeof(PrimaryKeyAttribute)) != null);
 
                primaryWhere = (string.Format("[{0}] = @primarykey", primary.Name));
 
                var sql = string.Format("SELECT * FROM [{0}] WHERE {1}", tableName, primaryWhere);
 
                return _conn.Query<T>(sql, new { primarykey = primaryValue }).FirstOrDefault();
            }
            catch (Exception)
            {
 
                throw;
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="strWhere">where条件</param>
        /// <param name="tableName">表名</param>
        /// <returns></returns>
        public virtual T GetModelQuery(string strWhere, string tableName = "")
        {
            try
            {
                var sql = string.Format("SELECT * FROM [{0}] WHERE {1}", tableName, strWhere);
                return _conn.Query<T>(sql, new { where = strWhere }).FirstOrDefault();
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        /// 根据主键删除
        /// </summary>
        /// <param name="primaryValue"></param>
        public virtual void Delete(string primaryValue)
        {
            try
            {
                string primaryWhere = string.Empty;
                var ps = typeof(T).GetProperties();
                var primary = ps.Single(p => p.CustomAttributes.FirstOrDefault(c => c.AttributeType == typeof(PrimaryKeyAttribute)) != null);
                var sql = string.Format("DELETE FROM [{0}] WHERE {1} = @primarykey", typeof(T).Name, primary.Name);
                _conn.Execute(sql, new { primarykey = primaryValue });
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="strWhere"></param>
        public void DeleteStrWhere(string strWhere)
        {
            try
            {
                var sql = string.Format("DELETE FROM [{0}] WHERE {1}", typeof(T).Name, strWhere);
                _conn.Execute(sql);
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="strWhere"></param>
        /// <param name="tableName"></param>
        /// <returns></returns>
        public virtual List<T> GetList(string strWhere, string tableName = "")
        {
            try
            {
                if (string.IsNullOrEmpty(tableName))
                    tableName = typeof(T).Name;
                var sql = string.Format("SELECT * FROM [{0}] " + (strWhere == "" ? "" : " WHERE " + " {1} "), tableName, strWhere);
                return _conn.Query<T>(sql).ToList();
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        ///
        /// </summary>
        /// <param name="param"></param>
        /// <returns></returns>
        public virtual PagerListResult<List<T>> GetPageList(PagerRequestParam param)
        {
            PagerListResult<List<T>> result = null;
            List<T> list = new List<T>();
            int pageTotal = 1;
            int recordTotal = 0;
            int startIndex = 1;
            int endIndex = param.PageSize;
            try
            {
                if (param.PageIndex - 1 > 0)
                {
                    startIndex = (param.PageIndex - 1 <= 0 ? 1 : param.PageIndex - 1) * param.PageSize + 1;
                    endIndex = param.PageIndex * param.PageSize;
                }
 
                if (string.IsNullOrEmpty(param.TableName))
                    param.TableName = typeof(T).Name;
                StringBuilder strSql = new StringBuilder();
                strSql.Append("SELECT * FROM ( ");
                strSql.Append(" SELECT ROW_NUMBER() OVER (");
                if (!string.IsNullOrEmpty(param.OrderBy))
                {
                    strSql.Append("ORDER BY T." + param.OrderBy);
                }
                else
                {
                    strSql.Append("ORDER BY T.ID DESC");
                }
                strSql.Append(")AS Row, T.*  FROM " + param.TableName + " T ");
                if (!string.IsNullOrEmpty(param.StrWhere))
                {
                    strSql.Append(" WHERE " + param.StrWhere);
                }
                strSql.Append(" ) TT");
                strSql.AppendFormat(" WHERE TT.Row BETWEEN {0} AND {1}", startIndex, endIndex);
 
                list = _conn.Query<T>(strSql.ToString(), param.StrWhere).ToList();
                if (list.Count > 0)
                {
                    recordTotal = this.GetRecordCount(param.StrWhere, param.TableName);
                    pageTotal = PagerRequestParam.Tool.PageTotal(param);
                }
                result = new PagerListResult<List<T>>(list, pageTotal, recordTotal);
            }
            catch (Exception ex)
            {
                result = new PagerListResult<List<T>>(ex);
            }
            return result;
        }
 
        /// <summary>
        /// 事务处理
        /// Demo
        /// </summary>
        /// <returns></returns>
        public int DeleteTransaction()
        {
            try
            {
                const string delete1 = "DELETE FROM ED_Data WHERE TableName=@TableName";
                const string delete2 = "DELETE FROM ED_Data WHERE TableName=@TableName";
 
                IDbTransaction transaction = _conn.BeginTransaction();
                int row = _conn.Execute(delete1, new { TableName = "user" }, transaction, null, null);
                row += _conn.Execute(delete2, new { TableName = "customer" }, transaction, null, null);
                transaction.Commit();
                return row;
            }
            catch (Exception)
            {
                throw;
            }
        }
 
        /// <summary>
        /// 获取记录数
        /// </summary>
        /// <param name="strWhere">Where条件</param>
        /// <returns></returns>
        public virtual int GetRecordCount(string strWhere, string tableName = "")
        {
            int count = 0;
            try
            {
                if (string.IsNullOrEmpty(tableName))
                    tableName = typeof(T).Name;
                StringBuilder strSql = new StringBuilder();
                strSql.Append("SELECT COUNT(1) FROM " + tableName);
                if (!string.IsNullOrEmpty(strWhere))
                {
                    strSql.Append(" WHERE " + strWhere);
                }
                count = _conn.ExecuteScalar<int>(strSql.ToString());
            }
            catch (Exception)
            {
 
                throw;
            }
            return count;
        }
    }
}

 

from:https://blog.csdn.net/kingcruel/article/details/52848950

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