asp.Netソース保存用プログラムページング

ソース:

 
  
namespace Alex 
  
{ 
  
public class PageTools 
  
{ 
  
/// 
 
  
///     
  
/// 
 
  
private string tableName; 
  
public string TableName 
  
{ 
  
get { return tableName; } 
  
set { tableName = value; } 
  
} 
  
/// 
 
  
///       
  
/// 
 
  
private string returnColumns; 
  
public string ReturnColumns 
  
{ 
  
get { return returnColumns; } 
  
set { returnColumns = value; } 
  
} 
  
/// 
 
  
///    
  
/// 
 
  
private string where; 
  
public string Where 
  
{ 
  
get { return where; } 
  
set { where = value; } 
  
} 
  
/// 
 
  
///     
  
/// 
 
  
private string orderColumnName; 
  
public string OrderColumnName 
  
{ 
  
get { return orderColumnName; } 
  
set { orderColumnName = value; } 
  
} 
  
/// 
 
  
///   ，true    
  
/// 
 
  
private Boolean orderDesc; 
  
public Boolean OrderDesc 
  
{ 
  
get { return orderDesc; } 
  
set { orderDesc = value; } 
  
} 
  
/// 
 
  
///    
  
/// 
 
  
private string keyColumnName; 
  
public string KeyColumnName 
  
{ 
  
get { return keyColumnName; } 
  
set { keyColumnName = value; } 
  
} 
  
/// 
 
  
///      
  
/// 
 
  
private Int32 pageSize; 
  
public Int32 PageSize 
  
{ 
  
get { return pageSize; } 
  
set { pageSize = value; } 
  
} 
  
/// 
 
  
///     
  
/// 
 
  
private Int32 pageIndex; 
  
public Int32 PageIndex 
  
{ 
  
get { return pageIndex; } 
  
set { pageIndex = value; } 
  
} 
  
/// 
 
  
/// SQL   
  
/// 
 
  
private SqlParameter[] whereParams; 
  
public SqlParameter[] WhereParams 
  
{ 
  
get { return whereParams; } 
  
set { whereParams = value; } 
  
} 
  
///  
  
///  
  
///    
  
///     
  
///   ，true    
  
///    
  
///      
  
///     
  
/// SQL   
  
public PageTools(string tableName, string returnColumns, string where, string orderColumnName, Boolean orderDesc, 
  
string keyColumnName, Int32 pageSize, Int32 pageIndex, params SqlParameter[] whereParams) 
  
{ 
  
this.TableName = tableName; 
  
this.ReturnColumns = returnColumns; 
  
this.Where = where; 
  
this.OrderColumnName = orderColumnName; 
  
this.OrderDesc = orderDesc; 
  
this.KeyColumnName = keyColumnName; 
  
this.PageSize = pageSize; 
  
this.PageIndex = pageIndex; 
  
this.WhereParams = WhereParams; 
  
} 
  
public PageTools() { } 
  
public DataTable RetrievePagerData() 
  
{ 
  
if (pageIndex == 1) 
  
{ 
  
return RetrieveTopData(); 
  
} 
  
else 
  
{ 
  
string sql = string.Format("select top {0} {1} from {2} where {3} and {6} not in ( select top {7} {6} from {2} where {3} order by {4} {5} ) order by {4} {5}", pageSize, returnColumns, tableName, where, orderColumnName, orderDesc == true ? "desc" : string.Empty, keyColumnName, pageSize * (pageIndex - 1)); 
  
return DbHelperSQL.Query(sql, CheckNull(whereParams)).Tables[0]; 
  
} 
  
} 
  
/// 
 
  
///         
  
/// 
 
  
///  
  
///  
  
///  
  
///  
  
public Int32 RetrieveDataCount() 
  
{ 
  
string sql = string.Format("select count(*) from {0} where {1}" , tableName, where); 
  
Int32 result = (Int32)DbHelperSQL.GetSingle(sql, CheckNull(whereParams)); 
  
return result; 
  
} 
  
/// 
 
  
///       
  
/// 
 
  
///  
  
///  
  
///  
  
///  
  
///  
  
///  
  
///  
  
///  
  
public DataTable RetrieveTopData() 
  
{ 
  
string sql = string.Format("select top {0} {1} from {2} where {3} order by {4} {5}", pageSize, returnColumns, tableName, where, orderColumnName, orderDesc == true ? "desc" : string.Empty); 
  
return DbHelperSQL.Query(sql, whereParams).Tables[0]; 
  
} 
  
/// 
 
  
///       
  
/// 
 
  
///  
  
///  
  
private SqlParameter[] CheckNull(SqlParameter[] paras) 
  
{ 
  
if (paras == null) 
  
{ 
  
return null; 
  
} 
  
List list = new List(); 
  
foreach (SqlParameter para in paras) 
  
{ 
  
if (para != null) list.Add(para); 
  
} 
  
return list.ToArray(); 
  
} 
  
} 
  
} 
  
 
 

ページバックグラウンド:

 
  
public partial class _Default : System.Web.UI.Page 
  
{ 
  
protected void Page_Load(object sender, EventArgs e) 
  
{ 
  
recordCount = page.RetrieveDataCount(); 
  
totalPages = (int)(Math.Ceiling((double)recordCount / (double)page.PageSize)); 
  
if (!IsPostBack) 
  
{ 
  
BindData(); 
  
} 
  
} 
  
Alex.PageTools page = new Alex.PageTools("Test", "*", "1=1", "USER_Account", false, "USER_Account", 10, 1, null); 
  
int recordCount; 
  
public int totalPages; 
  
 
  
private void BindData() 
  
{ 
  
int pageIndex = SmartGridView1.PageIndex; 
  
if(totalPages>0) 
  
{ 
  
if(pageIndex>totalPages-1) 
  
{ 
  
pageIndex=totalPages-1; 
  
} 
  
} 
  
else 
  
{ 
  
pageIndex=0; 
  
} 
  
SmartGridView1.PageIndex=pageIndex; 
  
page.PageIndex=pageIndex+1; 
  
SmartGridView1.DataSource = page.RetrievePagerData(); 
  
SmartGridView1.DataBind(); 
  
if (this.SmartGridView1.PageIndex == 0) 
  
{ 
  
this.btnFirst.Enabled = false; 
  
this.btnPrev.Enabled = false; 
  
if (totalPages == 1) 
  
{ 
  
this.btnLast.Enabled = false; 
  
this.btnNext.Enabled = false; 
  
} 
  
} 
  
else if (this.SmartGridView1.PageIndex == totalPages - 1) 
  
{ 
  
this.btnLast.Enabled = false; 
  
this.btnNext.Enabled = false; 
  
} 
  
this.lblpagesum.Text = totalPages.ToString(); 
  
this.lblpage.Text = (pageIndex + 1).ToString(); 
  
this.lblrowscount.Text = recordCount.ToString(); 
  
} 
  
public void NavigateToPage(object sender, CommandEventArgs e) 
  
{ 
  
btnFirst.Enabled = true; 
  
btnPrev.Enabled = true; 
  
btnNext.Enabled = true; 
  
btnLast.Enabled = true; 
  
string pageinfo = e.CommandArgument.ToString(); 
  
switch (pageinfo) 
  
{ 
  
case "Prev": 
  
if (this.SmartGridView1.PageIndex > 0) 
  
{ 
  
this.SmartGridView1.PageIndex -= 1; 
  
} 
  
break; 
  
case "Next": 
  
if (this.SmartGridView1.PageIndex < (totalPages - 1)) 
  
{ 
  
this.SmartGridView1.PageIndex += 1; 
  
} 
  
break; 
  
case "First": 
  
this.SmartGridView1.PageIndex = 0; 
  
break; 
  
case "Last": 
  
this.SmartGridView1.PageIndex = totalPages - 1; 
  
break; 
  
} 
  
if (this.SmartGridView1.PageIndex == 0) 
  
{ 
  
btnFirst.Enabled = false; 
  
btnPrev.Enabled = false; 
  
if (totalPages == 1) 
  
{ 
  
btnLast.Enabled = false; 
  
btnNext.Enabled = false; 
  
} 
  
} 
  
else if (this.SmartGridView1.PageIndex == totalPages - 1) 
  
{ 
  
btnLast.Enabled = false; 
  
btnNext.Enabled = false; 
  
} 
  
BindData(); 
  
} 
  
protected void gobtnClick(object sender, EventArgs e) 
  
{ 
  
int goPageIndex = Convert.ToInt32(this.goCount.Text.Trim()); 
  
if (goPageIndex > 0) 
  
{ 
  
if (goPageIndex >= totalPages) 
  
{ 
  
this.SmartGridView1.PageIndex = totalPages - 1; 
  
} 
  
else 
  
{ 
  
this.SmartGridView1.PageIndex = goPageIndex - 1; 
  
} 
  
} 
  
else if(goPageIndex <=0) 
  
{ 
  
this.SmartGridView1.PageIndex = 0; 
  
} 
  
if (this.SmartGridView1.PageIndex == 0) 
  
{ 
  
btnFirst.Enabled = false; 
  
btnPrev.Enabled = false; 
  
btnLast.Enabled = true; 
  
btnNext.Enabled = true; 
  
if (totalPages == 1) 
  
{ 
  
btnLast.Enabled = false; 
  
btnNext.Enabled = false; 
  
} 
  
} 
  
else if (this.SmartGridView1.PageIndex == totalPages - 1) 
  
{ 
  
btnLast.Enabled = false; 
  
btnNext.Enabled = false; 
  
btnFirst.Enabled = true; 
  
btnPrev.Enabled = true; 
  
} 
  
else 
  
{ 
  
btnLast.Enabled = true; 
  
btnFirst.Enabled = true; 
  
btnNext.Enabled = true; 
  
btnPrev.Enabled = true; 
  
} 
  
BindData(); 
  
} 
  
 
 

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