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By Yuriy, 01/10/2012 3:35 PM

Often, when drawing a chart, there’s a need to show a threshold – basically a line that indicates whether your values are going above or below it. Take for example this ColumnChart:

Let’s say we need to show a threshold for the value of 7. Here’s how. Continue reading 'How to add threshold line to MSChart in ASP.NET'»

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By Yuriy, 11/29/2011 3:23 PM

Found this gem today:

It’s a Visual Basic IDE environment for developing Android apps. But unlike other similar solutions it does not require bloated runtime running on the device, Basic4Android easily compiles native APK app.

Don’t learn Java, utilize your existing Visual Basic skills instead. And the community of thousands of developers can be a huge help as well.

Also you’re in luck today. Download the trial, play around with it and if you like it - use discount code “bvqbet” to get 50% off any version! Here’s how:

1. Visit purchase link: http://www.basic4ppc.com/android/purchase.html
2. Select Plimus as your checkout option
3. Enter coupon code bvqbet in the coupon code field
4. Profit! You get a 50% discound off a regular price

Happy coding!

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By Yuriy, 08/24/2011 12:11 PM

Scenario: You’re trying to run an ASP.NET application when suddenly an error is thrown similar to this:

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0016: Could not write to output file ‘c:\Windows\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\……..\………\some_code.dll’ — ‘Access is denied. ‘

You gave that folder all possible permissions imaginable and still the error persist. What the? Continue reading 'Solution for ASP.NET access to temporary folder denied error'»

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By Yuriy, 06/24/2011 2:14 PM

Visited IE test-drive site in my Chrome browser today and was greeted with a cheery banner:

I guess that “Don’t forget to enable your partial hardware acceleration in the about:flags thingy…” is a veiled reference that IE9′s HTML5 is fully “hardware accelerated”. Still funny.

Update: Since Microsoft is abandoning their “native HTML5″ party line the funny logo has been removed as well. Too bad, especially after comparing FPS on speed tests.

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By Yuriy, 04/14/2011 12:59 PM

If you’re trying to open an Excel 2003 XML file (SpreadsheetML) in Excel 2010 and getting “The file is corrupt and cannot be opened” error, try opening that file in WordPad (it will open as text XML) and save it back. Now try opening it in Excel 2010 again. You will still get “The file you’re trying to open is in a different format than specified by the file extension” warning, but after that the file should open.

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By Yuriy, 08/03/2010 11:25 AM

IE6 just won’t die. I know, continue to support it is a bad idea, but unfortunately many developers have no choice, some environments, especially corporate intranet will continue to use it until second coming (and then Safari will rule the world).

So, here is a small tip: If you need to use a named color from CSS3+ specification that old tired browser doesn’t understand – just use color’s hex equivalent instead. For example instead of

style="border: solid 1px LightGray;"

which will do nothing in IE6 use

style="border: solid 1px #d3d3d3;"

which will render nice light-gray border.

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By Yuriy, 07/16/2010 3:51 PM

This is probably a very obscure situation, but it happened to me, it could happen to someone else. Scenario: an ASP.NET page with Infragistics UltraWebGrid inside of a WARP panel. A button outside the WARP serves as a trigger for partial postback. First click on the button causes expected partial postback, but on the second click page does full postback and is screwed after that. The issue happens only in IE6/7, page works correctly in IE8.

Another condition – page contains ASP.NET AJAX ScriptManager control with ServiceReference path pointing to an ASMX WebService.

Turned out the issue was caused by project being left in debug mode (in web.config debug=”true”). Which caused WebService page to be loaded with parameter “jsdebug” in query string. Which apparently IE6 and 7 didn’t like very much. Switching to debug=”false” in web.config solved the problem.

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By Yuriy, 05/28/2010 11:08 AM

If you’re binding an ADO.NET DataTable to Infragistics UltraWebGrid and then programmaticaly sort the grid (e.g. add a column to a band’s SortedColumns collection) you may get an error:

Cannot find column My Column Name.

with stack trace starting from grid databinding and finishing in datatable’s sorting:

at System.Data.DataTable.ParseSortString(String sortString)
at System.Data.DataView.CheckSort(String sort)
at System.Data.DataView.set_Sort(String value)
at Infragistics.WebUI.UltraWebGrid.DBBinding.ProcessDataViewForFillRows(DataView dataView, RowsCollection rows)
at Infragistics.WebUI.UltraWebGrid.DBBinding.FillRows(UltraWebGrid grid, RowsCollection rows, IEnumerable datasource)
at Infragistics.WebUI.UltraWebGrid.DBBinding.BindList(IEnumerable datasource)
at Infragistics.WebUI.UltraWebGrid.DBBinding.DataBind(Object dataSource, String dataMember)
at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.DataBind()

If the grid binds OK without sorting and grouping, but fails with either – most likely the culprit is one of the columns in data table. Continue reading '“Cannot find column” DataTable error while grouping or sorting Infragistics UltraWebGrid'»

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By Yuriy, 04/26/2010 10:48 AM

If you’re using MS Chart Control for .NET Framework 3.5 SP1 (in .NET Framework 4.0 it comes as a part of a framework), you may experience a strange behavior when chart images aren’t rendered on the page:

If you’re using HTTP Handler to serve chart images (image URL looks something like “…/ChartImg.axd?i=chart_24dae5cb1f024c4a89f4fe492f05cc59_0.png“) missing mapping in IIS configuration could be to blame Continue reading 'ASP.NET Chart Control is not rendering image'»