Datagridview database not updating

For small numbers of rows requiring updates, it can be adequate to use an UPDATE statement for each row that requires an update.

But if there are a large number of rows that require an update, then the overhead of issuing large numbers of UPDATE statements can result in the operation as a whole taking a long time to complete.

Default View 2) A work thread is updating the Data Table 3) For the existing rows, if any cell value changed, it will update, which is good.

4) If the work thread add new rows to the Data Table, then the new row will not shown on the Data Grid.

Close() con = Nothing End Sub ' Save data back into database Private Sub Button1_Click(By Val sender As System. I copied this code into a project, ran it and the "Data Grid View1. The question marks are just placeholders for the data that will be used to update the database. I used to rock and roll every night and party every day. Now I'm lucky if I can find 30 minutes a week in which to get funky. Ye needs ta be preparin' yerselves fer Talk Like a Pirate Day!

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The dominant factor in the time taken to complete the overall operation tends to be the “admin” work in conveying the application’s intention to the database server rather than the actual updates to the database.A more effective solution to this problem is to attempt to reduce the number of UPDATE statements.Let us start with a simple table: UPDATE staff SET salary = 1200 WHERE name = ' Bob'; UPDATE staff SET salary = 1200 WHERE name = ' Jane'; UPDATE staff SET salary = 1200 WHERE name = ' Frank'; UPDATE staff SET salary = 1200 WHERE name = ' Susan'; UPDATE staff SET salary = 1200 WHERE name = ' John'; UPDATE staff SET salary = 1200 WHERE name = ' Bob'; UPDATE staff SET salary = 1250 WHERE name = ' Jane'; UPDATE staff SET salary = 1200 WHERE name = ' Frank'; UPDATE staff SET salary = 1250 WHERE name = ' Susan'; UPDATE staff SET salary = 1200 WHERE name = ' John'; We are no longer setting all the salary fields to the same value, so we can’t collapse it into a single statement.I have never used the Ole Db Data Adapter & Ole Db Command and am not sure what I am doing. Keep getting this err msg at the high-lighted code, "Object reference not set to an instance of an object".

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