System data common dbdataadapter updatingrowstatuserrorsrowupdatingeventargs rowupdatedevent datarow datarow
For more information, see Updating Data Sources with Data Adapters.If INSERT, UPDATE, or DELETE statements have not been specified, the Update method generates an exception. Example: write @Employee Id in Value column next to Employee Id and followed by @Original_Employee Id in the Filter column. Note: if you still confuse, ask me, email me, I will help you. Example: Employee Table Adapter or Company Table Adapter. Make sure there is something written there instead of (None)! If (None) in Delete Command, click the triangle faces down and click (New). Expand the Delete Command property and click the ‘…’ button in the Command Text sub-property. In other words, use @Original_ and followed by the table column’s name: @Original_ for Delete Command. What you need to do is to write @ in the Value column. For more information about adding data to a Data Table, see Adding Data to a Data Table. The actual removal occurs when you call Accept Changes method.
An exception is generated if it refers to a nonexistent column. NET Framework data provider's Parameter class determines whether to use the Original, Current, or Proposed version of the column value.
Source Column refers to the unmapped column name before any table mappings have been applied.
If Source Column refers to a nonexistent column, the action taken depends on one of the following Missing Mapping Action values.
For more information see Generating Commands with Command Builders.
The Update method retrieves rows from the table listed in the first mapping before performing an update.