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Updating dataset using datagrid

Hi, I am trying to insert a row into the Categories Table in Nothwinds database in MSDE.

NET - Core Reference" from MS Press covers this plus a plethora of other items about ADO. Using the Debugger, it appears the Data Set loads correctly, the Data Row is populated correctly, and the new row is added to the Data Set. Open() Dim Sql Insert Command1 As Sql Command = New Sql Command() Sql Insert Command1. Invalid Operation Exception' occurred in dll Additional information: Update requires a valid Insert Command when passed Data Row collection with new rows." Do you see anything wrong with the Insert? Invalid Operation Exception' occurred in dll Additional information: Update requires a valid Insert Command when passed Data Row collection with new rows." Do you see anything wrong with the Insert?

I am able to manually insert it using a query tool. Thanks in advance, Tom ====== Sub Main() Dim nwind Conn As Sql Connection = New Sql Connection ("Data Source=COL-TP5170-LT1\VSdot NET; Integrated Security=SSPI; Initial Catalog=Northwind;") Dim nwind DA As Sql Data Adapter = New Sql Data Adapter ("SELECT Category ID, Category Name, Description FROM Categories", nwind Conn) nwind Conn. But, I am getting the following error: "An unhandled exception of type 'System. But, I am getting the following error: "An unhandled exception of type 'System.

However you need that dataadapter with its builded commands as well, and therefore I would keep it on.

Dim e DS As New Data Set Dim e DA As New Ole Db Data Adapter e DS = BNew Dataset e Da = New Ole Db Adapter.

Using the Debugger, it appears the Data Set loads correctly, the Data Row is populated correctly, and the new row is added to the Data Set. Open() Dim Sql Insert Command1 As Sql Command = New Sql Command() Sql Insert Command1.

Command Text = "INSERT INTO Categories (Category Name, Description) VALUES (@Category Name, @Description)" Sql Insert Command1. I have the following declarations in the global module of the project: Public e DS As Data Set Public e DA As Ole Db. Table Name This code works, and the table is filled.Ole Db Data Adapter In the Load routine of the form, I have the following code Dim e DS As New Data Set Dim e DA As New Ole Db Data Adapter Dim e_str SQL As String e_str SQL = "SELECT sysid, new Date, new Time , [desc] FROM event WHERE con_id = '" & _ g_Contact ID & "' ORDER BY new Date DESC" e DA = New Ole Db Data Adapter(e_str SQL, CN) e DA. When I try to update, using the following code, I get an error, "Object reference not set to an instance of an object" e DA. Thanks, Gary Gary: Have you set the Update Command property of your Data Adapter so it knows how to update the datasource? NET This response is supplied "as is" without any representations or warranties. Calling Data Set, Data Table, Data Row Accept Changes marks the respective rows as processed (Data Row State. Command Text = "INSERT Categories (Category Name, Description) VALUES (@Category Name," & _ " @Description); SELECT Category ID, Category Name, Description, " & _ "FROM Categories WHERE (Category ID = @@IDENTITY)" Sql Insert Command1. Command Text = "INSERT Categories (Category Name, Description) VALUES (@Category Name," & _ " @Description); SELECT Category ID, Category Name, Description, " & _ "FROM Categories WHERE (Category ID = @@IDENTITY)" Sql Insert Command1. I found some people using the Get Changes method from the Data Set that was used as the Source for the Data Grid View control, but when I add to the Grid it doesn't appear to update the Data Set so when I call the Get Changes() method it returns null. I'll even take another way of updating the SQL Database if you got one. The trick was to use a Data Table and assign it to the Data Source.I've never used Get Changes but the definition says: "Gets a copy of the Data Table that contains all changes made to it since it was loaded or Accept Changes was last called." So perhaps you have to call Accept Changes on the table first. Accept Changes(); Update Row To Database(); It still didn't update the original dataset. However the read from xml function takes on file name. It confuses me to see the 'write to XML' example create three files. NVar Char, 15, "Category Name")) Sql Insert Command1. Fill(nwind DS, "Categories") Dim dt Table As Data Table Dim dr Row As Data Row dt Table = nwind DS. New Row() dr Row("Category Name") = "New Category Name" dr Row("Description") = "New Description" dt Table.

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