Finally I decided to upgrade to IE 8, and unfortunately my nightmare started soon after the upgrade. Unpredictably, I get an iexplore.exe application error: The instruction at “0x1001677e” reference memory at “0x043a8f64”. The memory could not be “read”. Click OK to terminate the program. It happens sometimes when I am browsing a page, or when I open a new page, or when I close a page, and the memory address is different each time. After […]
Tips & Tricks
144 posts
This actually applies to other data controls such as Repeater and DataList, but here I will just focus on GridView control. On ASP.NET web site, there is a tutorial titled “using ModalPopup with a Repeater Control”. To make the ModalPopup work, the tutorial says that the ModalPopupExtender must be put within the <ItemTemplate> section of the Repeater control, but the popup panel is outside the Repeater control. The reason is that if the ModalPopupExtender control […]
Popup window can be very helpful for editing records. For example, you have a GridView of your customers, when you click on a row or an “edit” button/icon, a new window pops up for you to edit the selected customer. After the editing is done and the record is saved, the popup window is closed and the parent window is reloaded to reflect the updated information. This is a very common scenario for using parent/child […]
There are different ways to remove the Visual SourceSafe control from a controlled solution, and the easiest way is to use the built-in Unbind feature in Visual Studio: select the solution from the Solution Explorer, then open File menu and select “Source Control” then “Change Source Control”. When Change Source Control window loads up, check all the projects in the project list and click “Unbind”, then confirm your action and finally exit out. Now the […]
When you use AJAX’s UpdatePanel, you may find that the controls inside of the UpdatePanel generate full postback instead of partial postback, if it occurs to you, then you may need to check your web.config file to see if there is a line like this: <xhtmlConformance mode=”Legacy” /> If yes, then that is the bad guy that causes all kinds of problems in AJAX including the issue mentioned above. Removing the line from web.config will […]
With the same CSS and similar code as I posted before for adding background color to CheckBoxList items, we can do the same thing to a RadioButtonList control. Here is the code-behind file: Private Sub RadioButtonList2_DataBound(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles RadioButtonList2.DataBound Dim cols As Integer = Me.RadioButtonList2.RepeatColumns If (cols = 0) Then cols = 1 End If For i As Integer = 0 To Me.RadioButtonList2.Items.Count – 1 Dim j As […]
UPDATE 12/08/2008: The CheckBoxList control in my example has RepeatColumns=0 and RepeatDirection=Vertical. if your RepeatColumns > 0, then you will need to change RepeatDirection=Horizontal, and also change the code behind as follows: Private Sub CheckBoxList1_DataBound(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles CheckBoxList1.DataBound Dim cols As Integer = Me.CheckBoxList1.RepeatColumns If (cols = 0) Then cols = 1 End If For i As Integer = 0 To Me.CheckBoxList1.Items.Count – 1 Dim j As Integer […]
I wrote a post before about giving user some feedback when a long process occurs. It is very simple if you use AJAX as the post shows. But what if your boss told you that you can’t use AJAX for whatever reason, like my boss told me? Well, the good news is that you still can do it with JavaScript and CSS. The trick is to use JavaScript’s setTimeout function to repeatedly check the value […]
Have you thought about customizing the style of the built-in ASP.NET FileUpload control because you are tired of its dull looking? Something like this: I will show you how this can be done very easily. Alright, here is the code snippet of the ASP.NET controls and the JavaScript function: Happy programming!
Here I am gonna use JavaScript and CSS to display a popup-style error window for validation like this: It still uses all validators the same as in Part One, but with some JavaScript functions and some CSS tricks, we can make it look like a pop up.