DbHelp.cs
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using Microsoft.EntityFrameworkCore;
using System;
using System.Data;
using System.Data.SqlClient;
namespace WebRepository
{
public class DbHelp
{
private readonly string CnString;
public DbHelp(string cnString)
{
CnString = cnString;
}
/// <summary>
/// 数据操作
/// </summary>
public int DataOperator(string Cmstring)
{
int Line = 0;
SqlCommand sqlCom = null;
SqlConnection sqlCon = null;
try
{
using (sqlCon = new SqlConnection(CnString))
{
sqlCon.Open();
sqlCom = new SqlCommand(Cmstring, sqlCon);
Line = sqlCom.ExecuteNonQuery();
sqlCon.Close();
}
}
catch (Exception ex)
{
//SEmessage = ex.Message.Replace(Environment.NewLine, "");
Line = -1;
throw new Exception(ex.Message.Replace(Environment.NewLine, ""));
}
finally
{
sqlCom?.Dispose();
sqlCon?.Dispose();
}
return Line;
}
/// <summary>
/// 查询信息，返回Objct
/// </summary>
public object GetObjct(string Cmstring)
{
object returnValue = null;
SqlCommand sqlCom = null;
SqlConnection sqlCon = null;
try
{
using (sqlCon = new SqlConnection(CnString))
{
sqlCon.Open();
sqlCom = new SqlCommand(Cmstring, sqlCon);
returnValue = sqlCom.ExecuteScalar();
sqlCon.Close();
}
}
catch (Exception ex)
{
throw new Exception(ex.Message.Replace(Environment.NewLine, ""));
}
finally
{
sqlCon.Dispose();
if (sqlCom != null)
sqlCom.Dispose();
}
return returnValue;
}
/// <summary>
/// 查询信息，返回DataSet
/// </summary>
public DataSet SelectGet(string CmString)
{
DataSet ds = new DataSet();
SqlConnection sqlCon = null;
SqlDataAdapter sqlDa = null;
try
{
using (sqlCon = new SqlConnection(CnString))
{
sqlCon.Open();
sqlDa = new SqlDataAdapter(CmString, sqlCon);
sqlDa.Fill(ds);
sqlCon.Close();
}
}
catch (Exception ex)
{
ds = null;
throw new Exception(ex.Message.Replace(Environment.NewLine, ""));
//App.ExFile.MessageLog(App.ExFile.Path_Emessage, "", ex.ToString());
}
finally
{
sqlCon.Dispose();
if (sqlDa != null)
sqlDa.Dispose();
}
return ds;
}
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns></returns>
public int RunProcedure(string storedProcName, IDataParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(CnString))
{
int result;
connection.Open();
SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
int rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
public int ProcOutput(SqlCommand cmd, string procName, SqlParameter[] paras)
{
int result;
cmd.CommandType = CommandType.StoredProcedure;//设置此类型是存储过程类型
cmd.CommandText = procName;//设置执行的存储过程//添加para参数
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
cmd.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
result = (int)cmd.Parameters["ReturnValue"].Value;
return result;
}
public int ProcOutput(string procName, SqlParameter[] paras)
{
SqlConnection conn = new SqlConnection(CnString);//创建数据库连接对象
conn.Open();//打开数据库连接
//SqlCommand cmd = conn.CreateCommand();//创建并执行与此连接关联的T-Sql语句命令的对象，可以不用这段用下面两段
SqlCommand cmd = new SqlCommand
{
Connection = conn
};
int result;
cmd.CommandType = CommandType.StoredProcedure;//设置此类型是存储过程类型
cmd.CommandText = procName;//设置执行的存储过程//添加para参数
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
cmd.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
result = (int)cmd.Parameters["ReturnValue"].Value;
conn.Close();//关闭连接
return result;
}
/// <summary>
/// 创建 SqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="connection">SQL连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand 对象实例</returns>
private SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new SqlParameter("ReturnValue",
SqlDbType.Int, 4, ParameterDirection.ReturnValue,
false, 0, 0, string.Empty, DataRowVersion.Default, null));
return command;
}
/// <summary>
/// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>SqlCommand</returns>
private SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
SqlCommand command = new SqlCommand(storedProcName, connection)
{
CommandType = CommandType.StoredProcedure
};
foreach (SqlParameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以DBNull.Value.
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
command.Parameters.Add(parameter);
}
}
return command;
}
/// <summary>
/// 调用存储过程Output参数方法
/// </summary>
/// <param name="procName">执行的存储过程语句</param>
/// <param name="paras">数据库的参数</param>
/// <param name="OutName">定义Output参数</param>
/// <returns>返回值</returns>
public object ProcOutput(string procName, SqlParameter[] paras, string OutName)
{
SqlConnection conn = new SqlConnection(CnString);//创建数据库连接对象
conn.Open();//打开数据库连接
//SqlCommand cmd = conn.CreateCommand();//创建并执行与此连接关联的T-Sql语句命令的对象，可以不用这段用下面两段
SqlCommand cmd = new SqlCommand
{
Connection = conn,
CommandType = CommandType.StoredProcedure,//设置此类型是存储过程类型
CommandText = procName//设置执行的存储过程//添加para参数
};
if (paras != null)
{
foreach (SqlParameter parameter in paras)
cmd.Parameters.Add(parameter);
}
int n = cmd.ExecuteNonQuery();//执行语句并返回受影响的行数
object o = cmd.Parameters[OutName].Value;//获取@CardID的值
conn.Close();//关闭连接
return o;
}
}
}