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Updating data sources with dataadapters
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.
Be aware that these statements are not performed as a batch process; each row is updated individually.
Calling Accept Changes will not replicate these changes back to the data source if the Data Set was filled using a Data Adapter. See Updating Data Sources with Data Adapters for more information.
might execute a DELETE statement, followed by an INSERT statement, and then another DELETE statement, because of the ordering of the rows in the Data Table.
When creating Data Table objects, the Fill operation normally creates only column name metadata.
However, if the Missing Schema Action property is set to Add With Key, appropriate primary keys and constraints are also created. For every inserted, modified, and deleted row, the Update method determines the type of change that has been performed on it (Insert, Update or Delete).
When using Each command associated with the IData Adapter usually has a parameter collection associated with it.
Parameters are mapped to the current row through the Source Column and Source Version properties of a . Source Column refers to a Data Table column that the IData Adapter references to obtain parameter values for the current row.For example, Update might execute a DELETE statement, followed by an INSERT statement, and then another DELETE statement, due to the ordering of the rows in the Data Table.It should be noted that these statements are not performed as a batch process; each row is updated individually.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. To String(); Ole Db Data Adapter d Adapter = new Ole Db Data Adapter(query, conn String); Ole Db Command Builder delete Builder = new Ole Db Command Builder(d Adapter); Data Table delete Table = new Data Table(); d Adapter.If the connection is closed before Fill is called, it is opened to retrieve data, then closed.Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. The Update then updates the row using the value of the property. After any data is loaded back into the Data Set, the On Row Updated event is raised, allowing the user to inspect the reconciled Data Set row and any output parameters returned by the command.After a row updates successfully, the changes to that row are accepted.