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Restricting input to textbox: allowing only numbers and decimal point

How can I restrict input to a text-box so that it accepts only numbers and the decimal point? 32 Answers ...
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Unresolved external symbol in object files

During coding in Visual Studio I got an unresolved external symbol error and I've got no idea what to do. I don't know what's wrong. Could you please decipher me? Where should I be looking for what kind of errors? ...
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Build fat static library (device + simulator) using Xcode and SDK 4+

...theoretically - build a single static library that includes both simulator and iPhone and iPad. 10 Answers ...
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How can I get Visual Studio 2008 Windows Forms designer to render a Form that implements an abstract

I engaged a problem with inherited Controls in Windows Forms and need some advice on it. 10 Answers ...
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Panel.Dock Fill ignoring other Panel.Dock setting

If you create a panel on a form and set it to Dock=Top and drop another panel and set its Dock=Fill, it may fill the entire form, ignoring the first panel. Changing the tab order does nothing. ...
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How do I replace text in a selection?

... This frustrated the heck out of me, and none of the above answers really got me what I wanted. I finally found the answer I was looking for, on a mac if you do ⌘ + option + F it will bring up a Find-Replace bar at the bottom of your editor which is local to t...
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LINQ Single vs First

...ou mean the other. Note: In my code, I will typically use FirstOrDefault() and SingleOrDefault() but that's a different question. Take, for example, a table that stores Customers in different languages using a Composite Key ( ID, Lang ): DBContext db = new DBContext(); Customer customer = db.Custome...
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SQL how to make null values come last when sorting ascending

...e with a datetime field. The field in question can be null. I have a query and I want the results sorted ascendingly by the datetime field, however I want rows where the datetime field is null at the end of the list, not at the beginning. ...
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Android How to adjust layout in Full Screen Mode when softkeyboard is visible

I have researched a lot to adjust the layout when softkeyboard is active and I have successfully implemented it but the problem comes when I use android:theme="@android:style/Theme.NoTitleBar.Fullscreen" this in my activity tag in manifest file. ...
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Spring MVC type conversion : PropertyEditor or Converter?

I am looking for the easiest and simplest way to bind and convert data in Spring MVC. If possible, without doing any xml configuration. ...