C# 连接SQLSERVER数据库常用操作类

//数据库连接字符串
public static string connectStr = @"server=.;database=test;uid=sa;pwd=123456;";

/// <summary>
/// 增删改操作类
/// </summary>
/// <param name="sql">执行的sql</param>
/// <returns></returns>
public static int ExecuteSql(string sql)
{
try
{
using (SqlConnection con = new SqlConnection(connectStr))
{
con.Open();
using (SqlCommand cmd = new SqlCommand(sql, con))
{
return cmd.ExecuteNonQuery();
}
}

}
catch (Exception ex)
{

throw ex;
}
}

/// <summary>
/// 查询sql
/// </summary>
/// <param name="sql">查询语句sql</param>
/// <returns></returns>
public static DataSet Query(string sql)
{
DataSet ds = new DataSet();
try
{
using (SqlConnection con = new SqlConnection(connectStr))
{
con.Open();
using (SqlDataAdapter cmd = new SqlDataAdapter(sql, con))
{
cmd.Fill(ds);
return ds;
}
}
}
catch (Exception)
{

throw;
}
}

/// <summary>
/// 执行增删改查存储过程
/// </summary>
/// <param name="ProcName">存储过程名</param>
/// <param name="parameter">存储过程参数</param>
/// <returns></returns>
public static int ExecuteProc(string ProcName, SqlParameter[] parameter)
{
try
{
using (SqlConnection con = new SqlConnection(connectStr))
{
con.Open();
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = ProcName;
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = con;

for (int i = 0; i < parameter.Length; i++)
{
cmd.Parameters.Add(parameter[i]);
}

return cmd.ExecuteNonQuery();
}
}
}
catch (Exception)
{

throw;
}
}
/// <summary>
/// 执行查询的存储过程
/// </summary>
/// <param name="ProcName">存储过程名</param>
/// <param name="parameter">存储过程参数</param>
/// <returns></returns>
public static DataSet ExecuteProcQuery(string ProcName, SqlParameter[] parameter)
{
DataSet ds = new DataSet();
try
{
using (SqlConnection con = new SqlConnection(connectStr))
{
con.Open();
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = ProcName;
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = con;

for (int i = 0; i < parameter.Length; i++)
{
cmd.Parameters.Add(parameter[i]);
}

SqlDataAdapter dt = new SqlDataAdapter(cmd);
dt.Fill(ds);
return ds;
}
}
}
catch (Exception)
{

throw;
}
}
/// <summary>
/// 执行事务
/// </summary>
/// <param name="sqls">执行的所有sql语句</param>
/// <returns></returns>
public static int ExecuteTranction(string sqls)
{

try
{
using (SqlConnection con = new SqlConnection(connectStr))
{
con.Open();

using (SqlTransaction transaction = con.BeginTransaction())
{

using (SqlCommand cmd = new SqlCommand())
{
try
{

cmd.CommandText = sqls;
cmd.Connection = con;
cmd.Transaction = transaction;
int i = cmd.ExecuteNonQuery();
transaction.Commit();
return i;
}
catch (Exception)
{
transaction.Rollback();

return 0;
}
}
}
}
}
catch (Exception)
{
return 0;
}
}