Strange Cascading DropDownList

[Ilya]

Hello again, dear Syncfusion. I cant understand what i do wrong. Take a look please.

I have Cascading DDL`s and Trend on the same page. I choose some rows and try to build a trend. But after reload page i cant choose rows on 2nd dropdownlist. Only after reloading all page.

Help me please. I do not want reload my page after every trend-building.

Link to my project: https://www.dropbox.com/s/duqdtx5p56y7mmh/Holod_r_1_syncfusion.7z?dl=0

BEFORE building:

AFTER building:

[Prince Oliver]

Hi Ilya,   

  

Thanks for contacting Syncfusion Support.   

  

We tried to download the sample you had attached in the dropbox, but we were not able to download it. It would help us to provide a solution if you could share your project in Syncfusion server while updating the forum. From the information you shared, we suspect that while cascading to second dropdown there is no data in the second dropdown. Hence it gets disabled.   

  

Regards,   

Prince   

[Ilya]

Cant load project in to forum, but it is more than 30MB. Attached it to my Gdisk: project

https://drive.google.com/open?id=0B2RgdnBQvJGfWE5uazdYYWZNX0E

[Ilya]

And one more question, please. I tried using Listbox instead DropDownLists and after drawing trend i loose selected index of Listbox. How can i save states of my elements after drawing? For example if i choose row number 3, and i want then it will be selected 3 after redrawing. Where can i set this?

[Prince Oliver]

Hi Ilya,  

  

Thanks for the update.  

  

Query: “How can i save states of my elements after drawing? For example if i choose row number 3, and i want then it will be selected 3 after redrawing. Where can i set this?”  

To maintain state of selected Item in listbox we suggest to use “EnablePersistence” property is set to true.  

 

Please refer to our online documentation for EnablePersistence API reference.  

https://help.syncfusion.com/cr/aspnet/Syncfusion.JavaScript.Web.ListBox.html#Syncfusion_JavaScript_Web_ListBox_EnablePersistence  

We can’t replicate the issue in this scenario “How can i save states of my elements after drawing? For example if i choose row number 3, and i want then it will be selected 3 after redrawing. Where can i set this?”  in your sample.   

Can you please provide the issue reproduced sample to us to replicate the issue that will helpful to provide appropriate solution?  

 

For Dropdownlist related queries, we have created a new incident under your account. Please log on to our support website to check for further updates 

 

https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents 

  

Regards,  

Prince.  

 

[Ilya]

Can you please provide the issue reproduced sample to us to replicate the issue that will helpful to provide appropriate solution?  

Sure. I made an example for you and attached. On page are: button "btn_fill_chart_simple" and Listbox "lbSensors". I set EnablePersistence="true", when i redraw, page is reloading and i loose shoosed row in ListBox.

Before:

AFTER:

Trend_Export.aspx

           <asp:Button ID="btn_fill_chart_simple" runat="server" OnClick="btn_fill_chart_Click" Text="Redraw chart" />

 <ej:ListBox ID="lbSensors" runat="server" PopupHeight="200px" DataGroupBy="category" EnablePersistence="true" AllowMultiSelection="false" >  </ej:ListBox>

Trend_Export.aspx.cs

            List<StepAreaChartData> data = new List<StepAreaChartData>();

                data.Add(new StepAreaChartData(2000, 416));

                .......

                data.Add(new StepAreaChartData(2011, 509));

                //Binding Datasource to Chart

                this.Chart1.DataSource = data;

                this.Chart1.DataBind();

                //Binding DataSource to Chart

                this.Chart1.DataSource = data;

                this.Chart1.DataBind();

Attachment: Loosing_selected_row_in_ListBox_a212db8.7z

[Rekha J]

Hi Ilya, 

 

Thanks for the update. 

 

We were able to reproduce the problem and have logged defect report regarding this. A support incident to track the status of this defect has been created under your account. Please log on to our support website to check for further updates 

 

https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents  

 

Please let me know if you have any questions. 

 

Regards, 

 

Rekha. 

[Ilya]

Sorry for missing. Couldn`t check it before.

Today i tested 15.1.0.33 update. It still works wrong. For example i select 2-nd row and draw chart. After redrawing of page my ListBox is with selected 3-rd row. 3-rd goes to 4-th, 4-th to 5th...

Tested it in project, wich i pin before.

BEFORE:

AFTER:

[Rekha J]

Hi Ilya, 

 

Thanks for the update.  

 

The reported issue “When listbox grouping enabled, selected item id not maintained after reloading the page” fix will be included in our upcoming volume1 SP1 2017 release.   

 

Regards, 

 

Rekha. 

[Ilya]

Hi Rekha!

When it will be released? And how i can update my project with this ServicePack?

[Ezhil S]

Hi Ilya, 

 

We are glad to announce that our Essential Studio 2017 Volume 1 Service Pack 1 Release v15.1.0.37 is rolled out and is available for download under the following link. 

 

https://www.syncfusion.com/forums/129119/essential-studio-2017-volume-1-service-pack-release-v15-1-0-37-available-for-download.    

 

We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance. 

 

Regards             

Ezhil S 

[Ilya]

Hi Ezhil!

Ye! Now it works fine. Thank you and your team.

[Ezhil S]

Hi Ilya, 

 

Thanks for the update. 

 

We are glad the issue has been resolved. 

 

Please get back to us if you need further assistance. 

 

Regards, 

Ezhil S