wpf - Not able to make cascading comboboxes work -

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here code create cascading comboboxes. trying populate family combobox(combobox2) based on value selected segment name(combox1).i able populate first combo static resource second 1 shows blank. calling method called "fillcomboboxfamilydata(segmentcode)" on selection change event of first combobox.

xaml code:

<grid height="142" horizontalalignment="left" margin="49,113,0,0" name="grid3"     verticalalignment="top" width="904">                 <combobox height="23" horizontalalignment="left" margin="35,26,0,0"    name="combobox1" verticalalignment="top" width="205" itemssource="{binding source={staticresource tblsegmentviewsource}}"  displaymemberpath="segment name" selectedvaluepath="segment code" selectionchanged="combobox1_selectionchanged"/>                 <combobox height="23" horizontalalignment="right" margin="0,26,395,0"    name="combobox2" verticalalignment="top" width="205" />     <window.resources>   <collectionviewsource x:key="tblsegmentviewsource" source="{binding path=tblsegment,    source={staticresource brickdataset}}" />     <collectionviewsource x:key="tblfamilyviewsource" source="{binding path=tblfamily,  source={staticresource brickdataset}}" />

*brickdataset main dataset pulling tables from.*

c#:

    private void combobox1_selectionchanged(object sender, selectionchangedeventargs e)     {         messagebox.show(combobox1.selectedvalue.tostring());         segmentcode = convert.toint32(combobox1.selectedvalue.tostring());         fillcomboboxfamilydata(segmentcode);     }      public void fillcomboboxfamilydata(int segment_code)     {         string connstring =             "data source=.\\sqlexpress;attachdbfilename=c:\\documents , settings\\dchaman\\my documents\\pdrt.mdf;integrated security=true;connect timeout=30;user instance=true ";          sqlconnection con = new sqlconnection(connstring);         con.open();         sqlcommand cmd = new sqlcommand();         cmd.connection = con;         cmd.commandtype = system.data.commandtype.text;         cmd.commandtext =             "select  tblfamily.[family name],tblfamily.[family code] tblfamily (tblfamily.[segment code] = @segmentcode)";          cmd.parameters.addwithvalue("@segmentcode", segment_code);          dataset objds = new dataset();         sqldataadapter dadapter = new sqldataadapter();         dadapter.selectcommand = cmd;         dadapter.fill(objds);         con.close();         if (objds.tables[0].rows.count > 0)         {             messagebox.show("here am");             combobox2.datacontext = objds.tables;             combobox2.items.insert(0, "--select family name--");             combobox2.displaymemberpath = "family name";             combobox2.selectedvalue = "family code";         }     }

i banging head table right now.please save me!

you aren't setting combobox2's itemssource. datacontext effect binding statements on it. if set itemssource correct table instead of datacontext, should on right path:

if (objds.tables[0].rows.count > 0) {     messagebox.show("here am");     combobox2.itemssource = ((ilistsource)objds.tables[0]).getlist(); // set itemssource instead of datacontext     combobox2.displaymemberpath = "family name";     combobox2.selectedvalue = "family code"; }

note when set itemssource, line inserts text items property fail, can not use both itemssource , items together.


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