前台获取后台datatable

﹏ヽ暗。殇╰゛Y 2021-12-20 08:04 323阅读 0赞

方法一：

前台代码：

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][] 代码

< div >   
 <% for  ( int  i  =  0 ; i  <  dtTitle.Rows.Count; i \++ )  
\{  %>   
 < div style = " float:left; " >   
 < a href = " Default2.aspx?id=<%Response.Write(dtTitle.Rows\[i\]\[ " ID " \].ToString()); %> " >   
 <% Response.Write(dtTitle.Rows\[i\]\[ " title " \].ToString());  %>   
 </ a ></ div >   
 <% \}  %>   
 </ div >

后台代码：

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public  partial  class  \_Default : System.Web.UI.Page  
\{  
 public  DataTable dtTitle  =  null ;  
 protected  void  Page\_Load( object  sender, EventArgs e)  
\{  
getData();  
\}  
 protected  void  getData()  
\{  
 string  sql  =  " select top 5 \* from viewTitle where isview=1 " ;  
DataSet dsTitle  =  DbHelperOleDb.Query(sql);  
dtTitle  =  dsTitle.Tables\[ 0 \];  
\}  
\}

注意：public DataTable dtTitle = null;

datatable要是全局的。不然前台读不到datatable。

方法二(拼接字符串)：

前台代码：用<%=str%>绑定后台变量;

< li >   
 < a href = " \# " > 新闻资讯 </ a >   
 < ul style = " width:183px; display: inline; margin-left: 25px; font-size: 14px; font-weight: bold; " >   
 <%= str %>   
 </ ul >   
  
 </ li >

后台代码：

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public  StringBuilder str  =  new  StringBuilder(); // 注意这里要public   
  protected  void  Page\_Load( object  sender, EventArgs e)  
\{  
 string  SQLString  =  " select \* from productclass where productid=0 " ;  
 string  connectionString  =  ConfigurationManager.ConnectionStrings\[ " ConnectionString " \].ToString();  
DataSet ds  =  new  DataSet();  
 using  (OleDbConnection connection  =  new  OleDbConnection(connectionString))  
\{  
 try   
\{  
connection.Open();  
OleDbCommand command  =  new  OleDbCommand(SQLString, connection);  
OleDbDataAdapter da  =  new  OleDbDataAdapter(command);  
da.Fill(ds,  " ds " );  
\}  
 catch  (System.Data.OleDb.OleDbException ex)  
\{  
 throw  new  Exception(ex.Message);  
\}  
\}  
DataTable dt  =  ds.Tables\[ 0 \];  
 int  count  =  dt.Rows.Count;  
 for  ( int  i  =  0 ; i  <  count; i \++ )  
\{  
str.Append( " <li style=\\ " width: 113px; display: inline;margin \- top: 15px;\\ " > " );  
str.Append( " <a title= "  \+  (dt.Rows\[i\]\[ " productname " \]).ToString()  \+  "  href=\\ " NewsList.aspx ? id = "  \+ Convert.ToInt32(dt.Rows\[i\]\[ " id " \]) +  " \\ "" );  
str.Append( "  style=\\ " color: \#FDFC89\\ "" );  
str.Append( " > " );  
str.Append( ""  \+  dt.Rows\[i\]\[ " productname " \].ToString()  \+  "" );  
str.Append( " </a> " );  
str.Append( " </li> " );  
\}  
 // Response.Write(str);   
  \}

转载于:https://www.cnblogs.com/sheseido/archive/2010/11/24/1886413.html

[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20211220/e748f11b1cc34ea891182dca273a7b07.png