如何更新DataTable

Question

I have a main DataSet which contains several DataTables . These different DataTables are bound to their DataGridView's DataSource respectively.

My problem is whenever I modify something in the display area such as the description textbox below and then click on save....

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The DataGridView doesn't have the replicated changes, as seen here:

I need a way to update the DataTable ... My save button successfully saves the information. I am quite new to DataSets and DataTables so this is my first time trying to update a DataTable. I doubt I need to reload the information in the DataTable, there must be something more efficient?

Answer 1

Updating a DataTable With Unknown Indexes

For more information: How to: Edit Rows in a DataTable

In order to edit an existing row in a DataTable, you need to locate the DataRow you want to edit, and then assign the updated values to the desired columns.

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Update existing records in typed datasets (Row index not known)

Assign a specific DataRow to a variable using the generated FindBy method, and then use that variable to access the columns you want to edit and assign new values to them.

Dim Description As String = "Hello World Modified"

'Update DataTable
Dim Row As DataSet1.DataTableRow
Row = DataSet1.DataTableRow.FindByPrimaryKey(PK)
Row.Description = Description

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Update existing records in untyped datasets (Row index not known)

Use the Select method of the DataTable to locate a specific row and assign new values to the desired columns

Dim Description As String = "Hello World Modified"

'Update DataTable
Dim Row() As Data.DataRow
Row = DataSet1.Tables("Table1").Select("PrimaryKey = '10'")
Row(0)("Description") = Description

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Once this is done, I don't need to refresh anything else - my DataGridView has the latest information.