lserp_cs_5.0/LSTest/SqlHelper.cs

using System;
using System.Data;
using System.Data.SqlClient;
using System.Runtime.InteropServices;

public abstract class SqlHelper
{
    public static SqlConnection conn;

    protected SqlHelper()
    {
    }

    public static DataSet ExecuteDataSet(CommandType cmdType, string cmdText, string tabName, params SqlParameter[] commandParameters)
    {
        DataSet set;
        SqlCommand cmd = new SqlCommand();
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            DataSet dataSet = new DataSet();
            adapter.Fill(dataSet, tabName);
            set = dataSet;
        }
        catch
        {
            throw;
        }
        return set;
    }

    public static DataSet ExecuteDataSet(int cmdType, string cmdText, string tabName, params SqlParameter[] commandParameters)
    {
        CommandType text = CommandType.Text;
        switch (cmdType)
        {
            case 4:
                text = CommandType.StoredProcedure;
                break;

            case 512:
                text = CommandType.TableDirect;
                break;
        }
        return ExecuteDataSet(text, cmdText, tabName, commandParameters);
    }

    public static DataSet ExecuteDataSet(string procedureName, string tabName, string[] parameterNames, object[] parameterValues)
    {
        DataSet set;
        try
        {
            SqlCommand selectCommand = new SqlCommand(procedureName, conn) {
                CommandType = CommandType.StoredProcedure
            };
            if ((parameterNames != null) && (parameterValues != null))
            {
                for (int i = 0; (i < parameterNames.Length) && (i < parameterValues.Length); i++)
                {
                    selectCommand.Parameters.AddWithValue(parameterNames[i], parameterValues[i]);
                }
            }
            SqlDataAdapter adapter = new SqlDataAdapter(selectCommand);
            DataSet dataSet = new DataSet();
            adapter.Fill(dataSet, tabName);
            set = dataSet;
        }
        catch
        {
            throw;
        }
        return set;
    }

    public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
        int num = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return num;
    }

    public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        int num = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return num;
    }

    public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
        int num = cmd.ExecuteNonQuery();
        cmd.Parameters.Clear();
        return num;
    }

    public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlDataReader reader;
        SqlCommand cmd = new SqlCommand();
        try
        {
            PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
            SqlDataReader reader2 = cmd.ExecuteReader();
            cmd.Parameters.Clear();
            reader = reader2;
        }
        catch
        {
            throw;
        }
        return reader;
    }

    public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
        object obj2 = cmd.ExecuteScalar();
        cmd.Parameters.Clear();
        return obj2;
    }

    public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
    {
        SqlCommand cmd = new SqlCommand();
        PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
        object obj2 = cmd.ExecuteScalar();
        cmd.Parameters.Clear();
        return obj2;
    }

    public static DataTable PageDataQuery(int ToPage, int PageSize, string Sele_mx, string id, string Froms, out int AllRecords)
    {
        return PageDataQuery(ToPage, PageSize, "", "", Sele_mx, id, Froms, out AllRecords);
    }

    public static DataTable PageDataQuery(int ToPage, int PageSize, string Order_by, string Sele_mx, string id, string Froms, out int AllRecords)
    {
        return PageDataQuery(ToPage, PageSize, "", Order_by, Sele_mx, id, Froms, out AllRecords);
    }

    public static DataTable PageDataQuery(int ToPage, int PageSize, string WhereString, string Order_by, string Sele_mx, string id, string Froms, out int AllRecords)
    {
        DataTable table = new DataTable();
        SqlCommand command = new SqlCommand("Common_FenYe", conn) {
            CommandType = CommandType.StoredProcedure
        };
        command.Parameters.Add("@ToPage", SqlDbType.Int).Value = ToPage;
        command.Parameters.Add("@PageSize", SqlDbType.Int).Value = PageSize;
        command.Parameters.Add("@WhereString", SqlDbType.VarChar, 4000).Value = WhereString;
        command.Parameters.Add("@Order_by", SqlDbType.VarChar, 500).Value = Order_by;
        command.Parameters.Add("@Sele_mx", SqlDbType.VarChar, 1000).Value = Sele_mx;
        command.Parameters.Add("@id", SqlDbType.VarChar, 30).Value = id;
        command.Parameters.Add("@Froms", SqlDbType.VarChar, 2000).Value = Froms;
        command.Parameters.Add("@AllRecords", SqlDbType.Int, 4).Direction = ParameterDirection.Output;
        try
        {
            SqlDataReader reader = command.ExecuteReader();
            table.Load(reader);
            reader.Close();
            AllRecords = int.Parse(command.Parameters["@AllRecords"].Value.ToString());
        }
        catch
        {
            throw;
        }
        finally
        {
            command.Dispose();
        }
        return table;
    }

    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 parameter in cmdParms)
            {
                cmd.Parameters.Add(parameter);
            }
        }
    }
}