Asp.net dropdownlist selecteditem null

Support lambda expression. Need to supply property name as string 3. Directly coupled with model. Next Recommended Reading. Net Core 6. Create A. Understanding Thread Starvation in. NET Core Applications. By default, ASP. For more information, see Script Exploits Overview. This property returns the Value property of the selected ListItem.

The SelectedValue property is commonly used to determine the value of the selected item in the list control. If multiple items are selected, the value of the selected item with the lowest index is returned. If no item is selected, an empty string "" is returned.

The SelectedValue property can also be used to select an item in the list control by setting it with the value of the item. This property cannot be set by themes or style sheet themes. If so what exactly is in the "Items" collection when you view it in the debugger?

Do you see something with a value of "0"? Accept Solution Reject Solution. This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself. Let me just explain what the error means: You have tried to use a variable, property, or a method return value but it contains null - which means that there is no instance of a class in the variable. It's a bit like a pocket: you have a pocket in your shirt, which you use to hold a pen.

If you reach into the pocket and find there isn't a pen there, you can't sign your name on a piece of paper - and you will get very funny looks if you try! The empty pocket is giving you a null value no pen here! Why is it empty? That's the question - it may be that you forgot to pick up your pen when you left the house this morning, or possibly you left the pen in the pocket of yesterdays shirt when you took it off last night.

We can't tell, because we weren't there, and even more importantly, we can't even see your shirt, much less what is in the pocket! Back to computers, and you have done the same thing, somehow - and we can't see your code, much less run it and find out what contains null when it shouldn't. But you can - and Visual Studio will help you here.

Run your program in the debugger and when it fails, VS will show you the line it found the problem on. You can then start looking at the various parts of it to see what value is null and start looking back through your code to find out why. So put a breakpoint at the beginning of the method containing the error line, and run your program from the start again.

This time, VS will stop before the error, and let you examine what is going on by stepping through the code looking at your values. But we can't do that - we don't have your code, we don't know how to use it if we did have it, we don't have your data. Add SelectStatus ; ddlAssetStatus. Add NewListitem ; ddlAssetStatus. Add OldListitem ; ddlAssetStatus. Value; txtAssetName. Text; txtAssetSN. Text; ddlMake. Text; ddlModel. Text; ddlAssetStatus.

Text; ddlAssignedto. CreateCommand ; cmd.