/// <summary>
/// ����������Ϣ������Դ��ѯ���ݱ�����ݼ���
/// </summary>
/// <param name="fields">�ֶ��б�</param>
/// <param name="tableName">����Դ�еı�����</param>
/// <param name="pkNames">������������</param>
/// <param name="pkValues">����ֵ���飬�������������Ӧ</param>
/// <param name="DB">���ݷ��ʶ���</param>
/// <returns></returns>
public DataSet SelectDataSet(string fields, string tableName, string[] pkNames, object[] pkValues, DMEDb_CommonDB DB)
{
string ParaChar = GetDBParaChar(DB);
string sqlSelect = "SELECT " + fields + " FROM " + tableName + " WHERE 1=1 ";
IDataParameter[] paras = new IDataParameter[pkNames.Length];
for (int i = 0; i < pkNames.Length; i++)
{
sqlSelect += " And " + pkNames[i] + "=" + ParaChar + pkNames[i];
paras[i] = DB.GetParameter(ParaChar + pkNames[i], pkValues[i]);
}
DataSet ds = DB.ExecuteDataSet(sqlSelect, CommandType.Text, paras);
ds.Tables[0].TableName = tableName;
return ds;
}
/// <summary>
/// �������ݱ�������ݷ��ʶ���
/// </summary>
/// <param name="dt"></param>
/// <param name="SQL"></param>
/// <param name="DB"></param>
/// <returns></returns>
private int UpdateDataTable(DataTable dt, string SQL, DMEDb_CommonDB DB)
{
string ParaChar = GetDBParaChar(DB);
SQL = SQL.Replace("@@", ParaChar);
int count = 0;
foreach (DataRow dr in dt.Rows)
{
IDataParameter[] paras = new IDataParameter[dt.Columns.Count];
for (int i = 0; i < dt.Columns.Count; i++)
{
paras[i] = DB.GetParameter(ParaChar + dt.Columns[i].ColumnName, dr[i]);
}
count += DB.ExecuteNonQuery(SQL, CommandType.Text, paras);
if (DB.ErrorMessage != "")
throw new Exception(DB.ErrorMessage);
}
return count;
}
/// <summary>
/// �������ݼ�����ָ���ı��У����ݱ��е�ָ���е�ֵ������Դ��ɾ������,�����ݷ��ʶ���
/// </summary>
/// <param name="ds">���ݼ�</param>
/// <param name="tableName">������</param>
/// <param name="columnName">����</param>
/// <param name="DB">���ݷ��ʶ���</param>
/// <returns></returns>
public int DeleteDataSet(DataSet ds, string tableName, string columnName, DMEDb_CommonDB DB)
{
DataTable dt = ds.Tables[tableName];
string ParaChar = GetDBParaChar(DB);
int count = 0;
string sqlDelete = "DELETE FROM " + tableName + " WHERE " + columnName + "=" + ParaChar + columnName;
foreach (DataRow dr in dt.Rows)
{
IDataParameter[] paras = { DB.GetParameter(ParaChar + columnName, dr[columnName]) };
count += DB.ExecuteNonQuery(sqlDelete, CommandType.Text, paras);
if (DB.ErrorMessage != "")
throw new Exception(DB.ErrorMessage);
if (count >= dt.Rows.Count) break;
}
return count;
}