C# SqlDataAdapter.Update()

问题

Im going crazy with this. I did the ff:

Create a datatable.
Fill it from a SQL db thru SqlDataAdapter.
Edit the datatable thru datagridview.
Call the sqldataadapter.update but the changes are not persisted to the db.

A closer look at the datatable after editing, the row states were not updated even if i actually edited the datatable thru the datagridview but the edited DataRow(s) have changes in the item array. Really confusing.. Any ideas? Thanks.

回答1:

You need several things to make this work. If you drag the table from the Data Sources view you end up with a few different things on your GUI:

a dataSet
a bindingSource
the TableAdapter
a tableAdapterManager
a BindingNavigator

With these in place you can look at the source code to see what hapens beind the scenes. You'll need the EndEdit (as Baldi said before) but you need a little more:

private void UpdateGridView()
{
    // validate that data types corresponds to database table column
    this.Validate();

    // ends edit on the graph table
    this.graphBindingSource.EndEdit();

    // ends edit on the graph table
    this.intervalBindingSource.EndEdit();

    // connect to the database - and exceute changes
    this.tableAdapterManager.UpdateAll(this.diagramDBDataSet);
}

Hopefully this gets you started. If you want to learn more - you can follow this .NET database slide show with the complementary database tutorial. Good luck!

回答2:

Do you use DataBinding? Calling EndEdit may help...!

来源：https://stackoverflow.com/questions/3226932/c-sharp-sqldataadapter-update

标签

sql

sqldataadapter