c# - Populating Gridview inside Listview ItemTemplate On Web User Control from Code Behind -

i have think simple question, might more complex..

i have spent few days looking answer on google , various questions on site cannot seem come right.

what trying bind gridview on user control ascx page default.aspx.cs on page load event.

user control markup follows:

<%@ control language="c#" autoeventwireup="true" codebehind="vulnerabilityexternalip.ascx.cs" inherits="vulnerabilityassesment.controls.vulnerabilityexternalip" %>  <asp:table runat="server" cellpadding="1" cellspacing="2"> <asp:tablerow>     <asp:tablecell>         <asp:label id="lblvulnerabilityname" runat="server" text="vulnerability name:" cssclass="itemname"></asp:label>     </asp:tablecell>     <asp:tablecell>         <asp:label id="lblvulnerabilitynametext" runat="server" text='<%# eval("mainvulnerabilityname") %>'></asp:label>     </asp:tablecell> </asp:tablerow> <asp:tablerow>     <asp:tablecell>         <asp:label id="lblvulnerabilitycategory" runat="server" text="category:" cssclass="itemname"></asp:label>     </asp:tablecell>     <asp:tablecell>         <asp:label id="lblvulnerabilitycategorytext" runat="server" text='<%# eval("category") %>'></asp:label>     </asp:tablecell> </asp:tablerow> <asp:tablerow>     <asp:tablecell>         <asp:label id="lblvulnerabilitypopularity" runat="server" text="popularity:" cssclass="itemname"></asp:label>     </asp:tablecell>     <asp:tablecell>         <asp:label id="lblvulnerabilitypopularitytext" runat="server" text='<%# eval("popularity") %>'></asp:label>     </asp:tablecell> </asp:tablerow> <asp:tablerow>     <asp:tablecell>         <asp:label id="lblvulnerabilityrisk" runat="server" text="risk:" cssclass="itemname"></asp:label>     </asp:tablecell>     <asp:tablecell>         <asp:label id="blvulnerabilityrisktext" runat="server" text='<%# eval("riskfactor") %>'></asp:label>     </asp:tablecell> </asp:tablerow> </asp:table>     <br /> <asp:label id="lblhostsaffected" runat="server" text="hosts affected:" cssclass="itemname"></asp:label> <br />     <asp:textbox id="txthostsaffected" runat="server" textmode="multiline" width="700px" readonly="true" broderwidth="0px" text='<%# eval("hostnameport") %>'></asp:textbox> <asp:gridview id="gvhostsaffected" runat="server" autogeneratecolumns="false" autogenerateeditbutton="true"> </asp:gridview> 

i referencing user control on default.aspx follows:

<%@ register src="~/controls/vulnerabilityexternalip.ascx" tagname="vulnerabilityexternalip" tagprefix="uc1" %> 

within default.asxp have following defined:

<asp:content id="bodycontent" contentplaceholderid="maincontent" runat="server">     <asp:listview id="lvvulnerabilityexternalip" runat="server">         <itemtemplate>             <uc1:vulnerabilityexternalip template="<%# container.dataitem %>" runat="server" id="vulnerabilityextip" name="vulnext" />         </itemtemplate>     </asp:listview> </asp:content> 

the code behind on default.aspx.cs follows:

namespace vulnerabilityassesment { public partial class _default : page {     protected void page_load(object sender, eventargs e)     {         string hostnameport = "";         string vulnerabilitydesc = "";         string vulnerabilitysummary = "";         string vulnerabilitysolution = "";         string vulnerabilitycve = "";         string vulnerbilitylink = "";         // use connection string web.config          string connection = configurationmanager.connectionstrings["csvulnerabilityassesment"].connectionstring;          //create new sql connection         sqlconnection conn = new sqlconnection(connection);          //create stored procedure command , declare parameters         sqlcommand vulnerabilityheader = new sqlcommand("[dbo].[_spget_vulnerabilityheader]", conn);         vulnerabilityheader.commandtype = commandtype.storedprocedure;         vulnerabilityheader.parameters.add("@vulnerabilityreport", sqldbtype.varchar).value = "external ip ranges";          //create data adapter , data set          sqldataadapter sdavulnerabilityheader = new sqldataadapter(vulnerabilityheader);         dataset dsvulnerabilityheader = new dataset();          //open connection          conn.open();          //fill data adapter          sdavulnerabilityheader.fill(dsvulnerabilityheader);          //fill in template          list<vulnerabilitytemplate> template = new list<vulnerabilitytemplate>();          if (dsvulnerabilityheader.tables != null)             if (dsvulnerabilityheader.tables[0].rows.count == 0)             {              }             else             if (dsvulnerabilityheader.tables.count > 0)             {                 foreach (datarow dr in dsvulnerabilityheader.tables[0].rows)                 {                      string groupid = dr["groupsequence"].tostring();                      //declare stored procedue vulnerability details , set parameters                      sqlcommand vulnerabilitydetail = new sqlcommand("[dbo].[_spget_vulnerabilitydetail]", conn);                     vulnerabilitydetail.commandtype = commandtype.storedprocedure;                     vulnerabilitydetail.parameters.add("@vulnerabilityreport", sqldbtype.varchar).value = "external ip ranges";                     vulnerabilitydetail.parameters.add("@groupsequence", sqldbtype.varchar).value = groupid;                     // declare sql data adapter vulnerability detail                     sqldataadapter sdavulnerabilitydetail = new sqldataadapter(vulnerabilitydetail);                     dataset dsvulnerabilitydetail = new dataset();                     // fill data adapter                      sdavulnerabilitydetail.fill(dsvulnerabilitydetail);                     // declare stored procedure vulnerability summary , set paramters                      sqlcommand vulnerabilitysummary = new sqlcommand("[dbo].[_spget_vulnerabilitysummary]", conn);                     vulnerabilitysummary.commandtype = commandtype.storedprocedure;                     vulnerabilitysummary.parameters.add("@vulnerabilityreport", sqldbtype.varchar).value = "external ip ranges";                     vulnerabilitysummary.parameters.add("@groupsequence", sqldbtype.varchar).value = groupid;                     // declare sql data adapter vulnerability detail                     sqldataadapter sdavulnerabilitysummary = new sqldataadapter(vulnerabilitysummary);                     dataset dsvulnerabilitysummary = new dataset();                     // fill data adapter                      sdavulnerabilitydetail.fill(dsvulnerabilitydetail);                     sdavulnerabilitysummary.fill(dsvulnerabilitysummary);                      foreach (datarow row in dsvulnerabilitydetail.tables[0].rows)                     {                         if (hostnameport != "")                             hostnameport += environment.newline;                          hostnameport += row["hostnameport"].tostring();                     }                      foreach (datarow vulnerabilitysummaryrow in dsvulnerabilitysummary.tables[0].rows)                     {                         vulnerabilitydesc += vulnerabilitysummaryrow["vulnerabilitydesc"].tostring();                         vulnerabilitysummary += vulnerabilitysummaryrow["vulnerabilitysummary"].tostring();                         vulnerabilitysolution += vulnerabilitysummaryrow["vulnerabilitysolution"].tostring();                     }                      //mygrid.datasource = dsvulnerabilitydetail.tables[0];                     //gridview mygrid = (gridview)lvvulnerabilityexternalip.items.findcontrol("gvhostsaffected");                      // returns null :(                      gridview mygrid = (gridview)lvvulnerabilityexternalip.findcontrol("gvhostsaffected");                        template.add(new vulnerabilitytemplate                     {                         mainvulnerabilityname = dr["mainvulnerabilityname"].tostring(),                         category = dr["category"].tostring(),                         popularity = dr["popularity"].tostring(),                         riskfactor = dr["riskfactor"].tostring(),                         hostnameport = hostnameport                         //vulnerabilitydesc = vulnerabilitydesc,                         //vulnerabilitysolution = vulnerabilitysolution,                         //vulnerabilitysummary = vulnerabilitysummary                        }                      );                      mygrid.databind();                 }             }          lvvulnerabilityexternalip.datasource = template;         lvvulnerabilityexternalip.databind();          conn.close();     }       // below not work      protected void listview_itemdatabound(object sender, listviewitemeventargs e)     {         if (e.item.itemtype == listviewitemtype.dataitem)         {             datatable table = (datatable)e.item.dataitem;             gridview mygrid = (gridview)e.item.findcontrol("gvhostsaffected");             mygrid.datasource = table;             mygrid.databind();         }     }  } } 

i cannot seem find gvhostsaffected grid view bind dsvulnerabilitydetail.tables[0] value (which should single column called hostsaffected, result return 1 or more rows.

i have included 2 things have tried denoted comment //below not work.

the template.add method work , populates necessary information on user control.

is there way can find gridview control during iteration , populate results dsvulnerabilitydetail data set?

thank in advance.

update 10 april 2017

below code behind webcontrol, see forgot include in original question.

    namespace vulnerabilityassesment.controls { public partial class vulnerabilityexternalip : system.web.ui.usercontrol {     protected void page_load(object sender, eventargs e)     {      }      public gridview mygridview     {                 {             return gvhostsaffected;         }         set         {            gvhostsaffected = value;         }     }   } 

}

the markup web control include answer vdwwd.

first, add public gridview property user control

public partial class webusercontrol1 : system.web.ui.usercontrol {     public gridview mygridview     {                 {             return gridview1;         }         set         {             gridview1 = value;         }     }       protected void page_load(object sender, eventargs e)     {     } 

then can access yo gridview on same page. thing left use findcontrol find user control inside listview

protected void button1_click(object sender, eventargs e) {     webusercontrol1 control = lvvulnerabilityexternalip.items[2].findcontrol("vulnerabilityextip") webusercontrol1;     control.mygridview.datasource = mysource;     control.mygridview.databind(); }