chevron_left
600 points
7 3 3

The problem is straightforward: the Adapter requires a proper SQL Update statement. These can be created by dataset designers and CommandBuilders, but there's nothing wrong with manually writing some SQL.

In any case, you'll need to double-check (debug) that the Update statement is still configured and what it is. It might be a SQL issue rather than a C# one.

Photo by grigioan19

Table of the Content:

                1 - Update requires a valid updatecommand when passed datarow collection with modified rows. 
                2 - Reasons
                3 - The Solution 
                4 - The Conclusion

Update requires a valid updatecommand when passed datarow collection with modified rows.

This error message may appear while dealing with the database in Visual Studio. When the generic update instructions are called for whatever reason, this message is usually displayed. What is this, exactly? You constructed a SQL server, filled it with tables, and added a table to the form. Some navigation keys on the form will show automatically if you accomplish this by dragging the table from the server. You'll now get this notice if you try to utilize the general update commands like insert, remove, or select. Let's see what's going on here.

Reasons

As expected, this created a DataGridView displaying table that was created. You might be perplexed as to why this notification keeps popping up. However, if you choose the dataset in the Solution Explorer, double-click it to open the design view, and then click on the TableAdapter, you'll notice that those commands are absent in the Properties Window. This is the reason the message keeps appearing. This error will occur if the table does not have a Primary Key as well. It's a more fundamental SQL Server issue, and it's as simple as that.

The Solution

The remedy to this problem isn't to sit down and painstakingly put in the missing commands, as you would imagine. All you have to do now is change the database and make sure at least one column is marked as a Primary Key. This might be the name column in my basic example, but more practically, I'd add an auto-numbering identification column to ensure that all entries in that column are unique. Restart your computer, create a new DataSet, and replace the DataGridView with drag and drop as previously. When you know the solution, it's straightforward; when you don't, it's tremendously aggravating.

So, if you've come here because you're looking at the above message – or anything similar - you've come to the right place.

The Conclusion

The problem is most commonly discovered while using the general Update command (Update commands can be used for Insert, Delete, or Select(Read) depending on the SQLCommand attached).

It's critical, as the error indicates, that the Update function is called by registering a valid UpdateCommand.

It is not a matter of worrying about facing any problem, but of worrying about getting upset in any unpleasant situation. Keep calm and find solutions to your problems. Your comments are always welcome.

If you read this far, tweet to the author to show them you care. Tweet a Thanks

More Posts

The function evaluation requires all threads to run zhteja - Jul 28
Cannot issue data manipulation statements with executequery() zhteja - Jun 29
What happens when a dataset includes records with missing data? Ferdy - Jul 27
You do not have sufficient privilege to access IIS websites on your machine Hussain Zafar - Jun 18
Arithmetic overflow error converting 'int' to data type 'numeric'. Bushra Rubab - Sep 19
How to solve error: converting data type 'varchar' to 'numeric'? Bushra Rubab - Sep 11
Detected Resolved Migration not Applied to Database Hussain Zafar - Jun 14
E: unable to fetch some archives, maybe run apt-get update or try with --fix-missing? NoirHusky - Sep 7
Error 1452: cannot add or update a child row: a foreign key constraint fails Ankur Ranpariya 1 - Aug 28
When designing a new database the first question users should ask themselves is? Bushra Rubab - Sep 10
When a Condition in an If then Statement Test True in Python Ankur Ranpariya - Jul 30
C++ Requires a Type Specifier for All Declarations AnkurRanpariyav - Aug 7
Statbin requires a continuous x variable the x variable is discrete. perhaps you want stat="count"? Hussain Zafar - Jun 1
The truth value of an array with more than one element is ambiguous. use a.any() or a.all() AAbouelenien - Sep 22
Failed to load resource: the server responded with a status of 404 (not found) Ankur Ranpariya - Sep 18
Failed to load resource: the server responded with a status of 400 (bad request) zhteja - Sep 17
Valueerror: setting an array element with a sequence Ankur Ranpariya - Sep 17
There is a problem with the resource you are looking for, and it cannot be displayed. zhteja - Aug 13
Get the emotion behind a conversation with IBM Watson EdemGold - Aug 12
How To Calculate The Address Of An Element With The Base Address Of A Two Dimensional Array? zhteja - Aug 10