gridview 常用方法合集

在项目中主要用了gridview来显示数据，其中的方法都是常用的。
1、利用sqldatasource动态邦定数据，其中sqldatasource1是托放在页面的sqldatasource控件，将数据邦定到gridview1上面

     void  gridviewband() {
             try
            {
                SqlDataSource1.ConnectionString  =  ConfigurationSettings.AppSettings[ " sqlconn " ];
                SqlDataSource1.SelectCommand  =  squerysql;
                GridView1.DataSource  =  SqlDataSource1;
                GridView1.DataBind();
                 // 看有没有数据 如果没有数据 提示错误  lblresult的text的内容是错误信息  
                 int  count  =  GridView1.Rows.Count;
                 if  (count  ==   0 ) { lblresult.Visible  =   true ; }
                 else  { lblresult.Visible  =   false ; }
            }
             catch    (SqlException ex5)
            {
                 // 提示错误信息
            }
             finally  {  
            }
    }

2、选择一行，获取关键字，然后传到其他页面

     protected   void  GridView1_SelectedIndexChanged( object  sender, EventArgs e)
    { // 选择某一行
        Session[ " selectkey " ]  =  GridView1.SelectedDataKey.Value;
        Response.Redirect( " ~/employee/employeedetail.aspx " );
    }

3、获取编辑行的关键字

         protected   void  GridView1_RowEditing( object  sender, GridViewEditEventArgs e)
    {
         // 编辑修改
        Session[ " editkey " ]  =  GridView1.DataKeys[e.NewEditIndex].Value.ToString();
        Response.Redirect( " ~/employee/employeeedit.aspx " );
    }

4、删除一行，获取关键字。这个地方还是用rowdeleting 事件。

     protected   void  GridView1_RowDeleting( object  sender, GridViewDeleteEventArgs e)
    {
       
        String idno111  =  GridView1.DataKeys[e.RowIndex].Value.ToString();
        SqlDataSource1.DeleteCommand  =   " delete from empinfo where empnum=' "   +  idno111  +   " ' "  
             +   " delete from employee where empnum=' "   +  idno111  +   " ' " ;
         // 删除行
         if  (e.RowIndex  >=   0 )
        {

            String connectstr  =  ConfigurationSettings.AppSettings[ " sqlconn " ];
            SqlConnection sqlconn  =   new  SqlConnection(connectstr);
            sqlconn.Open();
            SqlCommand comm  =   new  SqlCommand(SqlDataSource1.DeleteCommand, sqlconn);
            comm.ExecuteNonQuery();
            sqlconn.Close();
        }
    }

5、删除前提示关键字，不仅仅是提示“确认删除吗？” 而是提示“确认删除关键字是***的数据吗？”

首先在aspx文件脚本里面要设置 重要看的是gridview的标签里面要有
 DatakeyNames="关键字" 同时 CommandArgument='<%# Eval("departno") %>'  这两处要填写

< asp:GridView  ID ="GridView1"  runat ="server"  AllowPaging ="True"  AutoGenerateColumns ="False"
        CellPadding ="4"  DataKeyNames ="departno"  DataSourceID ="SqlDataSource1"  ForeColor ="#333333"
        GridLines ="None"  OnDataBound ="CustomersGridView_DataBound"  OnRowDeleting ="GridView1_RowDeleting"
        OnRowEditing ="GridView1_RowEditing"  OnSelectedIndexChanged ="GridView1_SelectedIndexChanged"
        PageSize ="15"  Width ="800px"  OnRowDataBound ="GridView1_RowDataBound" >
         < FooterStyle  BackColor ="#507CD1"  Font-Bold ="True"  ForeColor ="White"   />
         < Columns >
             < asp:BoundField  DataField ="departno"  HeaderText ="部门编号"  SortExpression ="departno"   />
             < asp:BoundField  DataField ="father"  HeaderText ="父级部门"  SortExpression ="father"   />
             < asp:BoundField  DataField ="departname"  HeaderText ="部门名称"  SortExpression ="departname"   />
             < asp:BoundField  DataField ="person"  HeaderText ="联系人"  SortExpression ="person"   />
             < asp:BoundField  DataField ="tel"  HeaderText ="固定电话"  SortExpression ="tel"   />
             < asp:BoundField  DataField ="mobiletel"  HeaderText ="手机"  SortExpression ="mobiletel"   />
            
             < asp:CommandField  ButtonType ="Image"  HeaderText ="查看"  SelectImageUrl ="~/icons/look.gif"
                SelectText ="查看"  ShowSelectButton ="True" >
                 < HeaderStyle  HorizontalAlign ="Center"   />
                 < ItemStyle  HorizontalAlign ="Center"   />
             </ asp:CommandField >
             < asp:CommandField  ButtonType ="Image"  EditImageUrl ="~/icons/edit.gif"  EditText ="编辑"
                HeaderText ="编辑"  ShowEditButton ="True" >
                 < HeaderStyle  HorizontalAlign ="Center"   />
                 < ItemStyle  HorizontalAlign ="Center"   />
             </ asp:CommandField >
             < asp:TemplateField  HeaderText ="删除"  ShowHeader ="False" >
                 < ItemStyle  HorizontalAlign ="Center"   />
                 < HeaderStyle  HorizontalAlign ="Center"   />
                 < ItemTemplate >
                     < asp:ImageButton  ID ="ImageButton1"  runat ="server"  CausesValidation ="False"  CommandName ="Delete"
                        ImageUrl ="~/icons/delete.gif"  CommandArgument ='<%#  Eval("departno") % > ' Text="删除" />
                 </ ItemTemplate >
             </ asp:TemplateField >
         </ Columns >
        
         < PagerTemplate >
             < table  width ="100%" >
                 < tr >
                     < td  width ="70%" >
                         < asp:Label  ID ="MessageLabel"  runat ="server"  Font-Size ="Larger"  ForeColor ="Black"
                            Text ="页码:" ></ asp:Label >
                         < asp:DropDownList  ID ="PageDropDownList"  runat ="server"  AutoPostBack ="true"  OnSelectedIndexChanged ="PageDropDownList_SelectedIndexChanged" >
                         </ asp:DropDownList >
                         < asp:LinkButton  ID ="linkBtnFirst"  runat ="server"  CommandArgument ="First"  CommandName ="Page"
                            ForeColor ="Black" > 首页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnPrev"  runat ="server"  CommandArgument ="Prev"  CommandName ="Page"
                            ForeColor ="Black" > 上一页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnNext"  runat ="server"  CommandArgument ="Next"  CommandName ="Page"
                            ForeColor ="Black" > 下一页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnLast"  runat ="server"  CommandArgument ="Last"  CommandName ="Page"
                            ForeColor ="Black" > 末页 </ asp:LinkButton >
                     </ td >
                     < td  align ="right"  width ="70%" >
                         < asp:Label  ID ="CurrentPageLabel"  runat ="server"  ForeColor ="black" ></ asp:Label >
                     </ td >
                 </ tr >
             </ table >
         </ PagerTemplate >
        
         < RowStyle  BackColor ="#EFF3FB"   />
         < EditRowStyle  BackColor ="#2461BF"   />
         < SelectedRowStyle  BackColor ="#D1DDF1"  Font-Bold ="True"  ForeColor ="#333333"   />
         < PagerStyle  BackColor ="#2461BF"  ForeColor ="White"  HorizontalAlign ="Center"   />
         < HeaderStyle  BackColor ="#507CD1"  Font-Bold ="True"  ForeColor ="White"   />
         < AlternatingRowStyle  BackColor ="White"   />
     </ asp:GridView >

然后在cs页面里填入事件：

     // 删除某一行的时候要提示关键字  不仅是提示确认删除，departno是关键字
     protected   void  GridView1_RowDataBound( object  sender, GridViewRowEventArgs e)
    {
         if  (e.Row.RowType  ==  DataControlRowType.DataRow)
        {
            ImageButton l  =  (ImageButton)e.Row.FindControl( " ImageButton1 " );
            l.Attributes.Add( " onclick " ,  " javascript:return  "   +
             " confirm('确认要删除部门编号为   "   +
            DataBinder.Eval(e.Row.DataItem,  " departno " )  +   "  的部门吗？ "   +   " ') " );
        }
    }
}

这样删除的时候就能提示关键字了。

6、显示页码
显示页码要在aspx代码里填入几行数据，上面的代码已经有了 重新写一下：
代码放在 </Columns>下面

         < PagerTemplate >
             < table  width ="100%" >
                 < tr >
                     < td  width ="70%" >
                         < asp:Label  ID ="MessageLabel"  runat ="server"  Font-Size ="Larger"  ForeColor ="Black"
                            Text ="页码:" ></ asp:Label >
                         < asp:DropDownList  ID ="PageDropDownList"  runat ="server"  AutoPostBack ="true"  OnSelectedIndexChanged ="PageDropDownList_SelectedIndexChanged" >
                         </ asp:DropDownList >
                         < asp:LinkButton  ID ="linkBtnFirst"  runat ="server"  CommandArgument ="First"  CommandName ="Page"
                            ForeColor ="Black" > 首页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnPrev"  runat ="server"  CommandArgument ="Prev"  CommandName ="Page"
                            ForeColor ="Black" > 上一页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnNext"  runat ="server"  CommandArgument ="Next"  CommandName ="Page"
                            ForeColor ="Black" > 下一页 </ asp:LinkButton >
                         < asp:LinkButton  ID ="linkBtnLast"  runat ="server"  CommandArgument ="Last"  CommandName ="Page"
                            ForeColor ="Black" > 末页 </ asp:LinkButton >
                     </ td >
                     < td  align ="right"  width ="70%" >
                         < asp:Label  ID ="CurrentPageLabel"  runat ="server"  ForeColor ="black" ></ asp:Label >
                     </ td >
                 </ tr >
             </ table >
         </ PagerTemplate >

然后在gridview的标签里面填入

OnDataBound="CustomersGridView_DataBound"

位置看 5 的代码就可以了。
然后再 cs代码区加入如下代码

// 显示页码

     protected   void  PageDropDownList_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow pagerRow  =  GridView1.BottomPagerRow;
        DropDownList pageList  =  (DropDownList)pagerRow.Cells[ 0 ].FindControl( " PageDropDownList " );
        GridView1.PageIndex  =  pageList.SelectedIndex;
    }

     protected   void  CustomersGridView_DataBound(Object sender, EventArgs e)
    {
         try
        {
            GridViewRow pagerRow  =  GridView1.BottomPagerRow;

            LinkButton linkBtnFirst  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnFirst " );
            LinkButton linkBtnPrev  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnPrev " );
            LinkButton linkBtnNext  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnNext " );
            LinkButton linkBtnLast  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnLast " );

             if  (GridView1.PageIndex  ==   0 )
            {
                linkBtnFirst.Enabled  =   false ;
                linkBtnPrev.Enabled  =   false ;
            }
             else   if  (GridView1.PageIndex  ==  GridView1.PageCount  -   1 )
            {
                linkBtnLast.Enabled  =   false ;
                linkBtnNext.Enabled  =   false ;
            }
             else   if  (GridView1.PageCount  <=   0 )
            {
                linkBtnFirst.Enabled  =   false ;
                linkBtnPrev.Enabled  =   false ;
                linkBtnNext.Enabled  =   false ;
                linkBtnLast.Enabled  =   false ;
            }
            DropDownList pageList  =  (DropDownList)pagerRow.Cells[ 0 ].FindControl( " PageDropDownList " );
            Label pageLabel  =  (Label)pagerRow.Cells[ 0 ].FindControl( " CurrentPageLabel " );

             if  (pageList  !=   null )
            {
                 for  ( int  i  =   0 ; i  <  GridView1.PageCount; i ++ )
                {
                     int  pageNumber  =  i  +   1 ;
                    ListItem item  =   new  ListItem(pageNumber.ToString()  +   " / "   +  GridView1.PageCount.ToString(), pageNumber.ToString());
                     if  (i  ==  GridView1.PageIndex)
                    {
                        item.Selected  =   true ;
                    }
                    pageList.Items.Add(item);
                }
            }
             if  (pageLabel  !=   null )
            {
                 int  currentPage  =  GridView1.PageIndex  +   1 ;
                pageLabel.Text  =   " 当前页：  "   +  currentPage.ToString()  +
                   "  /  "   +  GridView1.PageCount.ToString();
            }
        }
         catch  
        {
            Response.Write( " 现在还没有该部门的记录！！ " );
        }
    }

如果发生异常，是应为没有数据。这时候可以在catch里面提示没有数据。这样就可以绑定页码了。
但是这样做的条件是没有把绑定数据放在 （!ispostback）里面，如果放在里面了，就会出问题
因为页面的代码实际上是控制显示第几页。但是绑定数据放在了！ispostback里面了，所以不能重新绑定。
这样的情况，要写那个绑定的方法。
然后在cs文件里写下面的代码：

     protected   void  PageDropDownList_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow pagerRow  =  GridView1.BottomPagerRow;
        DropDownList pageList  =  (DropDownList)pagerRow.Cells[ 0 ].FindControl( " PageDropDownList " );
        GridView1.PageIndex  =  pageList.SelectedIndex;
        gridviewband(); /// 重新绑定数据，这是特殊的地方
    }

     protected   void  CustomersGridView_DataBound(Object sender, EventArgs e)
    {
         try
        {
            GridViewRow pagerRow  =  GridView1.BottomPagerRow;

            LinkButton linkBtnFirst  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnFirst " );
            LinkButton linkBtnPrev  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnPrev " );
            LinkButton linkBtnNext  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnNext " );
            LinkButton linkBtnLast  =  (LinkButton)pagerRow.Cells[ 0 ].FindControl( " linkBtnLast " );

             if  (GridView1.PageIndex  ==   0 )
            {
                linkBtnFirst.Enabled  =   false ;
                linkBtnPrev.Enabled  =   false ;
            }
             else   if  (GridView1.PageIndex  ==  GridView1.PageCount  -   1 )
            {
                linkBtnLast.Enabled  =   false ;
                linkBtnNext.Enabled  =   false ;
            }
             else   if  (GridView1.PageCount  <=   0 )
            {
                linkBtnFirst.Enabled  =   false ;
                linkBtnPrev.Enabled  =   false ;
                linkBtnNext.Enabled  =   false ;
                linkBtnLast.Enabled  =   false ;
            }
            DropDownList pageList  =  (DropDownList)pagerRow.Cells[ 0 ].FindControl( " PageDropDownList " );
            Label pageLabel  =  (Label)pagerRow.Cells[ 0 ].FindControl( " CurrentPageLabel " );

             if  (pageList  !=   null )
            {
                 for  ( int  i  =   0 ; i  <  GridView1.PageCount; i ++ )
                {
                     int  pageNumber  =  i  +   1 ;
                    ListItem item  =   new  ListItem(pageNumber.ToString()  +   " / "   +  GridView1.PageCount.ToString(), pageNumber.ToString());
                     if  (i  ==  GridView1.PageIndex)
                    {
                        item.Selected  =   true ;
                    }
                    pageList.Items.Add(item);
                }
            }
             if  (pageLabel  !=   null )
            {
                 int  currentPage  =  GridView1.PageIndex  +   1 ;
                pageLabel.Text  =   " 当前页：  "   +  currentPage.ToString()  +
                   "  /  "   +  GridView1.PageCount.ToString();
            }
        }
         catch   // (Exception ex5)
        {
            Response.Write( " 现在还没有该部门的记录！！ " );
        }
    }
         protected   void  GridView1_PageIndexChanging( object  sender, GridViewPageEventArgs e)
    {
        
        GridView1.PageIndex  =  e.NewPageIndex;
        gridviewband(); // 重新绑定数据
    }

这样就可以显示了 如果按照前面的方法会提示没有  pageindexchanging事件。