C dataadapter update not updating database

Posted by / 12-Feb-2020 05:41

Hi Why this code does not updated the DB, just the Data Set: Data Set ds = new Data Set(); Ole Db Data Adapter adapter = new Ole Db Data Adapter("Select * from Employees", @"Provider=Microsoft.

Update(ds, "Employees"); foreach(Data Row row in ds. All added and modified rows become "Unchanged", and, when you call Update (..), the data adapter doesn't find any modified rows to update. Hope this helps, Eliyahu "Shahar" Hi Why this code does not updated the DB, just the Data Set: Data Set ds = new Data Set(); Ole Db Data Adapter adapter = new Ole Db Data Adapter("Select * from Employees", @"Provider=Microsoft.

However, you can create a Sql Command Builder or Ole Db Command Builder object to automatically generate SQL statements for single-table updates if you set the property of a . Then, any additional SQL statements that you do not set are generated by the Command Builder.

This generation logic requires key column information to be present in the Data Set.

An application can call the Get Changes method in situations where you must control the sequence of statement types (for example, INSERT before UPDATE).

Command Text = "UPDATE Customer\r\n SET Cust Name = ?

encounters a change to a Data Row, it uses the Insert Command, Update Command, or Delete Command to process the change. Rows(0) category Row("Category Name") = "New Beverages" adapter. Write Line("Rows after update.") Dim row As Data Row For Each row In category Table. Write Line(": ", row(0), row(1)) Next End Using End Sub either by returning the auto-increment value as an output parameter of a stored procedure and mapping that to a column in a table, by returning the auto-increment value in the first row of a result set returned by a stored procedure or SQL statement, or by using the are sent to the data source is important.

You must explicitly set the commands before calling event and setting the Status to Skip Current Row. NVar Char, 15, "Category Name") Dim parameter As Sql Parameter = _ adapter.

For more information, see Merging Data Set Contents and Handling Data Adapter Events.

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Select Command = New Ole Db Command( _ query String, connection) Dim builder As Ole Db Command Builder = _ New Ole Db Command Builder(adapter) adapter.