using System.Data;
using System.Data.SqlClient;
namespace DataService
{
public class SQLHelper
{
public static readonly string connString = "Server=127.0.0.1;Database=WinFormDemo;uid=sa;pwd=123";
#region ExecuteNonQuery
/// <summary>
/// 不带参数的 ExcuteNonQuery
/// </summary>
public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 480;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, (SqlParameter[])null);
int val = cmd.ExecuteNonQuery();
return val;
}
}
/// <summary>
/// 带参数的 ExcuteNonQuery
/// </summary>
public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
#endregion ExecuteNonQuery
#region ExecuteScalar
/// <summary>
/// 不带参数的 ExecuteScalar
/// </summary>
public static object ExecuteScalar(string connString, CommandType cmdType, string cmdText)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, (SqlParameter[])null);
object val = cmd.ExecuteScalar();
return val;
}
}
/// <summary>
/// 带参数的 ExecuteScalar
/// </summary>
public static object ExecuteScalar(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, cmdParms);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
#endregion ExecuteScalar
#region ExecuteReader
/// <summary>
/// 不带参数的 ExecuteReader
/// </summary>
public static SqlDataReader ExecuteReader(string connString, CommandType cmdType, string cmdText)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connString);
cmd.CommandTimeout = 120;
try
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, (SqlParameter[])null);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/// <summary>
/// 带参数的 ExecuteReader
/// </summary>
public static SqlDataReader ExecuteReader(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
SqlConnection conn = new SqlConnection(connString);
cmd.CommandTimeout = 120;
try
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, cmdParms);
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
#endregion ExecuteReader
#region ExecuteDataSet
/// <summary>
/// 不带参数的 ExecuteDataSet, 可以分页
/// </summary>
public static DataSet ExecuteDataset(string connString, CommandType cmdType, string cmdText)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, (SqlParameter[])null);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "dtable");
cmd.Parameters.Clear();
return ds;
}
}
/// <summary>
/// 带参数的 ExecuteDataSet, 可以分页
/// </summary>
public static DataSet ExecuteDataset(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandTimeout = 120;
using (SqlConnection conn = new SqlConnection(connString))
{
PrepareCommand(cmd, conn, (SqlTransaction)null, cmdType, cmdText, cmdParms);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "dtable");
cmd.Parameters.Clear();
return ds;
}
}
#endregion ExecuteDataSet
#region PrepareCommand
/// <summary>
/// 初始化工作
/// </summary>
private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (SqlParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion PrepareCommand
}
}
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