Updating a datatable

17 Mar

Instantiate the Data Column object and pass column name and its data type as parameter.

Then call add method of Data Table column and pass the Data Column object as parameter.

You have the column headers filled with column information even if you returned 0 records. If there are many, it will take some time to count them.

When one tried to process a data table with 0 records but with column information it will throw exception. All you really want to know is "is there at least one?

To specify a column as Auto Increment (naturally it should be an integer type of field only), you need to set some properties of the column like Auto Increment, Auto Increment Seed.

@KMC the point is not that the loop throws not because there are no rows, it is that the variable is null, it does not exist, you can't add rows to it, it can never have any rows, it can't be looped through, it is null.

I thought my initial code was a very good start so I wouldn't get much suggested changes. I compare them by string so I'm able to specify a String Comparison type, else I have to check if the column datatype is of string first.

updating a datatable-72

The WHERE clause specifies which record(s) that should be updated.If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware.If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.If it is not null but is empty and has no rows then the loop will not throw an exception.A filtered copy of the Data Table that can have actions performed on it, and later be merged back in the Data Table using Merge.