Questions on UI for WinForms Forum

54 answers

2.0K+ views

Hi Admins

Previously i was using Default DataGridView for populating a Table.

It was working fine. But due to advace Functionality of RadGridView, I have develop the same with Telerik Controls (R2 SP1 2019).

But i have some Performance Issues.

Check the Sample Code and please suggest me for Performance Enhancement.

I'm Creating Column at Run Time Using This Code and Setting Grid Properties.

this.radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

this.radGridView1.ShowGroupPanel = false;

this.radGridView1.MasterTemplate.EnableGrouping = false;

this.radGridView1.EnableHotTracking = true;

this.radGridView1.MasterTemplate.SelectionMode = GridViewSelectionMode.FullRowSelect;

this.radGridView1.AllowAddNewRow = false;

this.radGridView1.AllowEditRow = false;

GridViewTextBoxColumn ColumnId = new GridViewTextBoxColumn

{

Name = "suppid",

HeaderText = "Code",

FieldName = "suppid",

Width = 80,

HeaderTextAlignment = ContentAlignment.MiddleCenter,

TextAlignment = ContentAlignment.MiddleCenter

};

radGridView1.MasterTemplate.Columns.Add(ColumnId);

I'm creating 10 different Columns using the Above Code.

Using the Below Code loading the Data to GridView

DataTable dt = new DataTable();

string query = "Select suppid from p_supplier" ;

SqlCommand cmd = new SqlCommand(query, Conn);

SqlDataAdapter DA = new SqlDataAdapter(query, Conn);

DA.Fill(dt);

BindingSource source = new BindingSource();

source.DataSource = dt;

radGridView1.MasterTemplate.DataSource = source;

I have shown you only 1 Column only to shorten my Code.

Please Suggest.

GridView

answered on 17 Mar 2021

13 answers

1.0K+ views

RadDropDownList

hello,

I am using RadDropDownList and binding it in Code behind using a datatable. The issue is when the form loads the RadDropdownlist displays the first record in the list and this fires the selectedindexchanged.
I want the RadDropDownlist to be in the state where the user selects the item he wants from the list and then the selectedindexchanged event fires.

Any ideas?

Thanks

DropDownList

answered on 17 Mar 2021

2 answers

100 views

How to utilize launch argument in Editor

Hello,

I just recently discovered that this tool was added to the Telerik win UI toolbox and love the functionality. Within the editor it is possible to assign a launch argument value. However, after reviewing the documentation I'm not entirely sure how to go about referencing that argument within the toast template, as well as passing in the value for that argument at run time.

I've attached a screenshot of what I'm trying to accomplish within the toast notification editor. Two questions:

1) What's the correct syntax to reference the launch argument variable value within the toast notification editor?

2) Is there a method to assign the variable value prior to calling the .ShowToastNotification(index) method?

Thanks!

ToastNotificationManager

answered on 16 Mar 2021

10 answers

680 views

cell editing

Hi

I am using RadGridView. In cell edit mode of a decimal column, I do not want the incerement and decrement in cell value. So I set the Step property to 0. It is working. Now by pressing the up and down key in cell edit mode do not change the cell value. But there is a problem if cell is empty and I press up key then first time it puts some value in the cell ( I think that value is some last inserted/updated value of the grid). Can you provide some solution for that.

Also I want that in cell edit mode when user presses up and down key, it commits the cell value and cursor moves to up and down cell accordingly. How can I acheive it. Any Help would be appreciated!

Thnaks

Regards

GridView

answered on 15 Mar 2021

5 answers

245 views

Custom zoom

Hello,

my task was to enable zoom of GridView using mouse wheel + Ctrl key. I implemented it with partial success. I am not able to correctly resize some parts of the grid - see attached pic with red rectangles. I can provide a sample project. And a subquestion - is it possible to disable scrolling while the Ctrl Key is pressed?

Thanks in advance for help.

Tomáš

GridView

answered on 15 Mar 2021

1 answer

97 views

DesktopAlert as ShowDialog

Hi,

I want to call DesktopAlert as ShowDialog instead of show. if any solution available ?

Thanks

DesktopAlert

answered on 15 Mar 2021

2 answers

323 views

Margin between checkbox and image

Hello Telerik,

How could I play with margin and padding to add some spacing between image, texte and certainly my checkboxe ?

Thank you in advance for your support !

CheckedListBox

answered on 12 Mar 2021

2 answers

109 views

Getting Value Selected By Mouse Click.

I want to execute some code when a user types and then uses the Mouse to click on an item in the list.

I will need to access the item selected.

I am having a hard time to find the correct event to capture this.

Thanks.

AutoCompleteBox

answered on 12 Mar 2021

2 answers

80 views

Can the Ctrl + A key combination only select used cells?

Hi.

As is known, Ctrl + A selects all cells in the spreadsheet. Can we change this to only select cells that are full?

Spreadsheet

answered on 12 Mar 2021

3 answers

187 views

GridViewSpreadStreamExport "External table is not in the expected format"

Hi,

I don't know if this is the correct forum for this question but I couldn't find an Excel export/import forum which might be more suitable.

I'm using GridViewSpreadStreamExport to export RadGridViews to Excel which works fine and I can open the generated spreadsheet in Excel without any issues.

The issue comes when I try to open/read the generated spreadsheet in code using OleDbCommand with the following connection string:

@"Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" + path + "; Extended Properties = " + @"""Excel 12.0 Xml;HDR=YES;IMEX=1"";";

I get an "External table is not in the expected format" error message on opening the connection.

If I first open the generated spreadsheet in Excel and just save it, without making any changes to it,the issue does not occur and I can open the spreadsheet in code without any issues.

The spreadsheet does have multiple worksheets, each one from a new instance of a RadGridView, but I don't think that is the issue because generating a spreadsheet with a single worksheet has the same issue.

The RadGridView is in memory, not on the UI, and I just set some of the column headers, width and text alignments.

Export format is SpreadStreamExportFormat.Xlsx and the export of individual RadGridViews are done via:

spreadStreamExport.RunExport(path, new SpreadStreamExportRenderer());

Although I have tried not creating a new instance of SpreadStreamExportRenderer as well.

I've reduced the export to its bare minimum (removed column header and text alignment settings) but nothing has helped.

Any ideas what the issue could be?

Thanks,

Arash

GridView