rowstate

问题 For various reasons I am having to send a typed dataset to a WCF service endpoint. This works fine except that upon Deserializing, the RowState of each row in each DataTable is set to 'Added', regardless of what they were on the client. If I write the serialized stream out to a file, I see that the RowState is not part of the Serialized data. How can I add this so that I can preserve the RowState across service boundaries? Not that I think it matters, but the client process is running .net 3

问题 I have added a lookup combobox to my datagridview. Any changed to an existing row or adding a new row changed the value in RowState on save to Modified or Added. except changing a value in the combobox. On save, the RowState remains as unmodified. the code i use to add the combobox is. DataGridViewComboBoxColumn cbQualification = new DataGridViewComboBoxColumn(); cbQualification.HeaderText = "Course Code"; DataSet myDataSet = GetData.GetCoursesData(); cbQualification.DataSource = myDataSet

问题 I have added a lookup combobox to my datagridview. Any changed to an existing row or adding a new row changed the value in RowState on save to Modified or Added. except changing a value in the combobox. On save, the RowState remains as unmodified. the code i use to add the combobox is. DataGridViewComboBoxColumn cbQualification = new DataGridViewComboBoxColumn(); cbQualification.HeaderText = "Course Code"; DataSet myDataSet = GetData.GetCoursesData(); cbQualification.DataSource = myDataSet

问题 I'm using the DataSet / DataTable / DataAdapter architecture to mediate between the database and my model objects, which have their own backing (they aren't backed by a DataRow). I've got a DataAdapter with AcceptChangesDuringFill = False , AcceptChangesDuringUpdate = False , and FillLoadOption = OverwriteChanges . Here's my understanding of the DataAdapter model under these conditions: DataAdapter.Update() DataRowState.Added will result in the InsertCommand firing DataRowState.Modified will

问题 I'm having a problem with binding data to the DataGridView. I have a class MyDataGridView that inherit from DataGridView. My data grid view data source is a BindingSource object that holds a DataTable as the data source. Problem is, when I make changes via (my) DataGridView object - the rowState stays on 'unmodified' instead of modified; even though the values in the DataTable changed (that's what makes my update not work, since it consider the rowState as undefined). Notice that making