//查询操作，判断是否存在
public static bool IsPriExist(string str)
{
SqlConnection conn = ConnectionManger.GetConnection();
conn.Open();
SqlCommand cmd = new SqlCommand(str, conn);
SqlDataReader reader;
try
{
reader = cmd.ExecuteReader();
if (reader.Read())
{
reader.Dispose();
return(true);
}
else
{
return(false);
}
}
catch
{
return(false);
}
finally
{
cmd.Dispose();
}
}
/// <summary>
/// 带参数绑定数据
/// </summary>
/// <param name="str">存储过程</param>
/// <returns></returns>
public static DataSet GetDataSet(string str, CommandType cmdtype, SqlParameter[] cmdParm)
{
SqlConnection conn = ConnectionManger.GetConnection();
DataSet ds = new DataSet();
try
{
SqlCommand cmd = new SqlCommand(str, conn);
cmd.CommandText = str;
cmd.CommandType = cmdtype;
//PrepareCommand(cmd, conn, null, cmdtype, str, parm);
SqlDataAdapter da = new SqlDataAdapter(cmd);
foreach (SqlParameter parm in cmdParm)
{
cmd.Parameters.Add(parm);
}
da.Fill(ds);
return(ds);
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// 通过分页存储过程绑定数据
/// </summary>
/// <param name="tablename">表、视图名</param>
/// <param name="fieldkey">关键字</param>
/// <param name="currentpage">当前页数</param>
/// <param name="pagesize">每页的数量</param>
/// <param name="fieldshow">显示的字段</param>
/// <param name="fieldorder">排序方式</param>
/// <param name="where">条件</param>
/// <param name="recordcount">总计页数</param>
/// <returns></returns>
public static DataSet GetGriview(string tablename, string fieldkey, int currentpage, int pagesize, string fieldshow, string fieldorder, string where, ref int recordcount)
{
SqlConnection conn = ConnectionManger.GetConnection();
conn.Open();
SqlCommand cmd = new SqlCommand("pageination", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@tbname", SqlDbType.NVarChar, 50).Value = tablename;
cmd.Parameters.Add("@FieldKey", SqlDbType.NVarChar, 50).Value = fieldkey;
cmd.Parameters.Add("@PageCurrent", SqlDbType.Int).Value = currentpage;
cmd.Parameters.Add("@PageSize", SqlDbType.Int).Value = pagesize;
cmd.Parameters.Add("@FieldShow", SqlDbType.NVarChar, 1000).Value = fieldshow;
cmd.Parameters.Add("@FieldOrder", SqlDbType.NVarChar, 50).Value = fieldorder;
cmd.Parameters.Add("@Where", SqlDbType.NVarChar, 1000).Value = where;
cmd.Parameters.Add("@RecordCount", SqlDbType.Int).Direction = ParameterDirection.Output;
cmd.Parameters.Add("@PageCount", SqlDbType.Int).Direction = ParameterDirection.Output;
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
recordcount = (int)cmd.Parameters["@RecordCount"].Value;
//pagecount = cmd.Parameters["@PageCount"].Value.ToString();
conn.Close();
return(ds);
}
/// <summary>
/// 执行一条返回第一条记录第一列的SqlCommand命令，通过专用的连接字符串。
/// 使用参数数组提供参数
/// </summary>
/// <remarks>
/// 使用示例：
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个object类型的数据，可以通过 Convert.To{Type}方法转换类型</returns>
public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = ConnectionManger.GetConnection())
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return(val);
}
}
/// <summary>
///执行一个不需要返回值的SqlCommand命令，通过指定专用的连接字符串。
/// 使用参数数组形式提供参数列表
/// </summary>
/// <remarks>
/// 使用示例：
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个数值表示此SqlCommand命令执行后影响的行数</returns>
public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection conn = ConnectionManger.GetConnection())
{
//通过PrePareCommand方法将参数逐个加入到SqlCommand的参数集合中
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
//清空SqlCommand中的参数列表
cmd.Parameters.Clear();
return(val);
}
}
public static DataSet DataSetBind(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
using (SqlConnection connection = ConnectionManger.GetConnection())
{
DataSet ds = new DataSet();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(ds);
//object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return(ds);
}
}
/// <summary>
/// 通过数据集来绑定数据
/// </summary>
/// <param name="str">SQL语句/存储过程CommandType.Text/CommandType.StoredProcedure </param>
/// <returns></returns>
public static DataSet GetDataSet(string str, CommandType cmdtype)
{
SqlConnection conn = ConnectionManger.GetConnection();
DataSet ds = new DataSet();
try
{
SqlCommand cmd = new SqlCommand(str, conn);
cmd.CommandType = cmdtype;
SqlDataAdapter da = new SqlDataAdapter(str, conn);
da.Fill(ds);
return(ds);
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// 执行一条返回结果集的SqlCommand命令，通过专用的连接字符串。
/// 使用参数数组提供参数
/// </summary>
/// <remarks>
/// 使用示例：
/// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一个有效的数据库连接字符串</param>
/// <param name="commandType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
/// <param name="commandText">存储过程的名字或者 T-SQL 语句</param>
/// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
/// <returns>返回一个包含结果的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = ConnectionManger.GetConnection();
// 在这里使用try/catch处理是因为如果方法出现异常，则SqlDataReader就不存在，
//CommandBehavior.CloseConnection的语句就不会执行，触发的异常由catch捕获。
//关闭数据库连接，并通过throw再次引发捕捉到的异常。
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return(rdr);
}
catch
{
conn.Close();
conn.Dispose();
throw;
}
}
