asp.net aspnetpager分页统计时与实际不符的解决办法

答案：基本函数如下：
复制代码 代码如下:

/// <summary> 
/// 需要分页时使用,根据参数和ConditionExpress获取DataTable 
/// </summary> 
/// <param name="_tableName">表名</param> 
/// <param name="_fieldNames">字段名集合,用逗号分开</param> 
/// <param name="_OrderColumn">排序字段,用于统计有多少条记录</param> 
/// <param name="IsDesc">是否倒序</param> 
/// <param name="_indexColumn">自增字段名</param> 
/// <param name="_currentPage">当前页</param> 
/// <param name="pageSize">页大小</param> 
/// <param name="_rowsCount">总记录数</param> 
/// <returns>获取到的DataTable</returns> 
public static DataTable GetDataTable(string _tableName, string _fieldNames, string _OrderColumn, bool IsDesc, string _indexColumn, int _currentPage, int pageSize, string conditionExpress, ref int _rowsCount) 
{ 
using (SqlConnection conn = new SqlConnection(connectionString)) 
{ 
string whereStr = " where 1=1 "; 
string sort = IsDesc ? " desc" : " asc"; 

string sqlStr = " from " + _tableName; 
//排序字段 
string orderStr = " order by " + _OrderColumn + sort; 
if (_OrderColumn != _indexColumn) 
orderStr += "," + _indexColumn + sort; 
if (conditionExpress != string.Empty) 
{ 
whereStr += conditionExpress; 
} 
sqlStr += whereStr; 

//取得符合条件的数据总数 
SqlCommand cmd = new SqlCommand("select count(" + _OrderColumn + ") " + sqlStr, conn); 
conn.Open(); 
try 
{ 
_rowsCount = (int)cmd.ExecuteScalar(); 
} 
catch (Exception ex) 
{ 
throw new Exception(ex.Message); 
} 

if (_currentPage > _rowsCount) _currentPage = _rowsCount; 

if (_currentPage > 1) 
{ 
if (IsDesc) 
sqlStr += " and " + _OrderColumn + " < (select MIN(" + _OrderColumn + ") from "; 
else 
sqlStr += " and " + _OrderColumn + " > (select MAX(" + _OrderColumn + ") from "; 
sqlStr += "(select top " + (pageSize * (_currentPage - 1)) + " " + _OrderColumn + " from " + _tableName + whereStr + orderStr + ") as t)"; 
} 
sqlStr = "select top " + pageSize + " " + _fieldNames + sqlStr + orderStr; 

try 
{ 
DataSet ds = new DataSet(); 
SqlDataAdapter da = new SqlDataAdapter(sqlStr, conn); 
da.Fill(ds); 
return ds.Tables[0]; 
} 
catch (Exception EX) 
{ 
throw new Exception(EX.Message); 
} 
} 
} 

调用如下： 
复制代码 代码如下:

private void bind() 
{ 
int rowCount = 1; 
string wherestr = string.Empty; 
//设置分页 
anPager.AlwaysShow = true; 
anPager.PageSize = 10; 
this.rptdictionary.DataSource = GetDataTable( 
"dictionary_Toysgogo_", 
"[id_dictionary_],[namecn_dictionary_],[nameen_dictionary_],[point_dictionary_]", 
"[id_dictionary_]", 
true, 
"[id_dictionary_]", 
this.anPager.CurrentPageIndex, 
anPager.PageSize, 
wherestr, 
ref rowCount 
); 
this.anPager.RecordCount = rowCount; 
this.rptdictionary.DataBind(); 
} 

复制代码 代码如下:

//分页切换 
protected void anPager_PageChanging(object src, Wuqi.Webdiyer.PageChangingEventArgs e) 
{ 
this.anPager.CurrentPageIndex = e.NewPageIndex; 
this.tbxType.Text = this.tbxType.Text; 
bind(); 
} 

之前一直在页数方面直接用数字写进去，没有写成anPager.PageSize=10;的形式，在老汤的提醒下，做了修改，也解决了一直困扰我的问题。

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