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Kevin
180
paging and multi selection - recommended settings.
posted

Hi

 

I have a simple webdropdown that i set up in code behind in the page_load as follows:-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If Not IsPostBack

Then

myTable = myDataServer.GetDataTable(

 

 

"select * from tblPersonnelTest"

)

 

 

 

Me.WDDTest.EnablePaging =

True

 

 

 

Me

.WDDTest.PageSize = 2

 

 

 

Me

.WDDTest.DataSource = myTable

 

 

 

Me.WDDTest.TextField =

"name"

 

 

 

Me.WDDTest.ValueField =

"PersonnelId"

 

 

 

me.wddtest.EnableViewState = True

Me.WDDTest.EnableAjaxViewState =

True

 

 

 

Me.WDDTest.EnableMultipleSelection =

True

 

 

 

Me.WDDTest.EnableLoadOnDemand =

False

 

 

 

Me.WDDTest.EnableAutoFiltering = Infragistics.Web.UI.ListControls.AutoFiltering

.Server

 

 

 

Me.WDDTest.DropDownContainerHeight = Unit

.Pixel(300)

else

'rebind webdropdown to datasource.

end if

My problems  are when I page through the various pages I loose any selections I have already made in earlier pages?

This is beacuse if I dont rebind the control on postback to the datasource, when I try and go to the next page it always displays the first page of data?

So what should the recommended settings be for a webdropdown that has enabledpaging and has a multiselection option turned on? and what will I need to put in the code behind for these settings to work.

regards

Kevin

 

  • 19693
    Suggested Answer
    posted

    Hello Kevin,

    Currently only the grids (WebDataGrid and WebHierarchicalDataGrid) support cross page selection

    http://help.infragistics.com/NetAdvantage/ASPNET/2011.1?page=WebDataGrid_Persistent_Selection.html

    In your scenario I recommend you using LoadOnDemand and disabling the Paging

    protected void Page_Load(object sender, EventArgs e)

        {  

            WebDropDown1.DataSource = MakeTable();

            WebDropDown1.TextField = "Item";

            WebDropDown1.ValueField = "id";

            WebDropDown1.DropDownItemBinding.ValueField = "id";

            WebDropDown1.DropDownItemBinding.TextField = "Item";

            WebDropDown1.EnablePaging = false;

            WebDropDown1.EnableLoadOnDemand = true;

            WebDropDown1.EnableAjaxViewState = true;

            WebDropDown1.EnableMultipleSelection = true;

            WebDropDown1.EnableAutoFiltering = Infragistics.Web.UI.ListControls.AutoFiltering.Server;

            WebDropDown1.EnableViewState = true;

            WebDropDown1.EnableClosingDropDownOnSelect = false;      

        }

     

    Let me know if you need further assistance regarding this.