/// <summary>
/// 获取分页数据（防注入功能的）
/// 宋彪 2014-06-25 构造List<KeyValuePair<string, object>>比IDbDataParameter[]方便一些
/// dbHelper.MakeParameters(dbParameters)--》IDbDataParameter[]
/// </summary>
/// <param name="recordCount">记录条数</param>
/// <param name="dbHelper">dbHelper</param>
/// <param name="tableName">数据来源表名</param>
/// <param name="selectField">选择字段</param>
/// <param name="pageIndex">当前页</param>
/// <param name="pageSize">每页显示多少条</param>
/// <param name="conditions">查询条件</param>
/// <param name="dbParameters">查询参数</param>
/// <param name="orderBy">排序字段</param>
/// <returns>数据表</returns>
public static IDataReader ExecuteReaderByPage(IDbHelper dbHelper, out int recordCount, string tableName, string selectField, int pageIndex, int pageSize, string conditions, IDbDataParameter[] dbParameters, string orderBy)
{
IDataReader result = null;
recordCount = 0;
if (null != dbHelper)
{
recordCount = DbLogic.GetCount(dbHelper, tableName, conditions, dbParameters);
result = DbLogic.ExecuteReaderByPage(dbHelper, tableName, selectField, pageIndex, pageSize, conditions, dbParameters, orderBy);
}
return(result);
}
/// <summary>
/// 分页读取数据
/// </summary>
/// <param name="recordCount">条数</param>
/// <param name="pageIndex">当前页</param>
/// <param name="pageSize">每页显示</param>
/// <param name="sortExpression">排序字段</param>
/// <param name="sortDire">排序顺序</param>
/// <param name="tableName">表名</param>
/// <param name="conditional">查询条件</param>
/// <param name="dbParameters">数据参数</param>
/// <param name="selectField">选择哪些字段</param>
/// <returns>数据表</returns>
public virtual IDataReader ExecuteReaderByPage(out int recordCount, int pageIndex = 0, int pageSize = 20, string sortExpression = null, string sortDire = null, string tableName = null, string conditional = null, IDbDataParameter[] dbParameters = null, string selectField = null)
{
if (string.IsNullOrEmpty(tableName))
{
tableName = this.CurrentTableName;
}
if (tableName.ToUpper().IndexOf("SELECT") >= 0 || DbHelper.CurrentDbType == DotNet.Utilities.CurrentDbType.MySql)
{
// 统计总条数
string commandText = string.Empty;
if (string.IsNullOrEmpty(tableName))
{
tableName = this.CurrentTableName;
}
string whereClause = string.Empty;
if (!string.IsNullOrEmpty(conditional))
{
whereClause = string.Format(" WHERE {0} ", conditional);
}
commandText = tableName;
if (tableName.ToUpper().IndexOf("SELECT") >= 0)
{
commandText = "(" + tableName + ") T ";
// commandText = "(" + tableName + ") AS T ";
}
commandText = string.Format("SELECT COUNT(1) AS recordCount FROM {0} {1}", commandText, whereClause);
object returnObject = DbHelper.ExecuteScalar(commandText, dbParameters);
if (returnObject != null)
{
recordCount = int.Parse(returnObject.ToString());
}
else
{
recordCount = 0;
}
return(DbLogic.ExecuteReaderByPage(DbHelper, recordCount, pageIndex, pageSize, tableName, dbParameters, sortExpression, sortDire));
}
// 这个是调用存储过程的方法
return(DbLogic.ExecuteReaderByPage(DbHelper, out recordCount, pageIndex, pageSize, sortExpression, sortDire, tableName, conditional, selectField));
}
/// <summary>
/// 获取分页DataTable
/// </summary>
/// <param name="recordCount">记录总数</param>
/// <param name="pageIndex">当前页数</param>
/// <param name="pageSize">每页显示多少条</param>
/// <param name="whereClause">条件</param>
/// <param name="order">排序字段</param>
/// <returns>数据表</returns>
public virtual IDataReader ExecuteReaderByPage(out int recordCount, int pageIndex, int pageSize, string whereClause, IDbDataParameter[] dbParameters, string order)
{
recordCount = DbLogic.GetCount(DbHelper, this.CurrentTableName, whereClause, dbParameters, this.CurrentIndex);
return(DbLogic.ExecuteReaderByPage(DbHelper, this.CurrentTableName, this.SelectFields, pageIndex, pageSize, whereClause, dbParameters, order, this.CurrentIndex));
}
