Ok, this is the function that is called to display the table it is called
from a button in each DataRow
private void RecordDataGrid_ItemCommand(object source,
DataGridCommandEventArgs e)
{
if(e.CommandName == "Show Access Viewer")
{
//adjust the recorddatagrid columns
RecordDataGrid.Columns.Clear();
BoundColumn DateColumn = new BoundColumn();
DateColumn.DataField = "Date";
DateColumn.HeaderText = "Date";
DateColumn.ReadOnly = true;
BoundColumn UserColumn = new BoundColumn();
UserColumn.DataField = "Username";
UserColumn.HeaderText = "Username";
UserColumn.ReadOnly = true;
BoundColumn FieldColumn = new BoundColumn();
FieldColumn.DataField = "Field";
FieldColumn.HeaderText = "Field";
FieldColumn.ReadOnly = true;
BoundColumn PreviousValueColumn = new BoundColumn();
PreviousValueColumn.DataField = "Previous Value";
PreviousValueColumn.HeaderText = "Previous Value";
PreviousValueColumn.ReadOnly = true;
BoundColumn NewValueColumn = new BoundColumn();
NewValueColumn.DataField = "New Value";
NewValueColumn.HeaderText = "New Value";
NewValueColumn.ReadOnly = true;
BoundColumn RecordIDColumn = new BoundColumn();
RecordIDColumn.DataField = "RecordID";
RecordIDColumn.HeaderText = "Record ID";
RecordIDColumn.ReadOnly = true;
RecordDataGrid.Columns.Add(RecordIDColumn);
RecordDataGrid.Columns.Add(DateColumn);
RecordDataGrid.Columns.Add(UserColumn);
RecordDataGrid.Columns.Add(FieldColumn);
RecordDataGrid.Columns.Add(PreviousValueColumn);
RecordDataGrid.Columns.Add(NewValueColumn);
DataView theView = new DataView(theDataSet.Tables["Access Viewer"]);
theView.RowFilter = "RecordID=0";
theView.RowStateFilter = DataViewRowState.ModifiedCurrent;
Debug.WriteLine(string.Format("RowFilter = {0}",
theView.RowFilter));
RecordDataGrid.DataSource = theView;
RecordDataGrid.DataBind();
}
}
this is the function that sets the table up it is called everytime the page
goes through the lifecycle
private void addDataSource(Records recordSet, Job theJob)
{
//make sure any old data source is removed
RecordDataGrid.DataSource = null;
//clear the columns
RecordDataGrid.Columns.Clear();
//add the columns to the Record Data Grid
setRecordGridColumns(recordSet);
if(Session["TheDataSet"] == null)
{
theDataSet = new DataSet(theJob.theJobName);
//create the records table
DataTable theTable = new DataTable("Records");
//the gridstyle
//DataGridTableStyle theGridStyle = new DataGridTableStyle();
//theGridStyle.MappingName = "Records";
//add the id column
DataColumn theRecordsIDColumn = new DataColumn("RecordID",
typeof(int));
theRecordsIDColumn.ReadOnly = true;
theTable.Columns.Add(theRecordsIDColumn);
//loop through the fields and add a new column for each
foreach(Field theField in recordSet.theFields)
{
DataColumn newColumn = new DataColumn();
newColumn.ColumnName = theField.theName;
newColumn.Unique = false;
newColumn.ReadOnly = false;
newColumn.DataType = System.Type.GetType("System.String");
theTable.Columns.Add(newColumn);
}
//recordDataGrid.TableStyles.Add(theGridStyle);
//create the access viewer table
DataTable theAccessViewerTable = new DataTable("Access Viewer");
//create the columns
DataColumn dateColumn = new DataColumn("Date", typeof(DateTime));
dateColumn.ReadOnly = true;
DataColumn userColumn = new DataColumn("Username", typeof(string));
userColumn.ReadOnly = true;
DataColumn fieldColumn = new DataColumn("Field", typeof(string));
fieldColumn.ReadOnly = true;
DataColumn previousValueColumn = new DataColumn("Previous Value",
typeof(string));
previousValueColumn.ReadOnly = true;
DataColumn newValueColumn = new DataColumn("New Value",
typeof(string));
newValueColumn.ReadOnly = true;
DataColumn recordID = new DataColumn("RecordID", typeof(int));
recordID.ReadOnly = true;
//add the columns to the table
theAccessViewerTable.Columns.AddRange(new
DataColumn[]{recordID,dateColumn, userColumn, fieldColumn,
previousValueColumn, newValueColumn});
//add the tables to the data set
theDataSet.Tables.Add(theTable);
theDataSet.Tables.Add(theAccessViewerTable);
// Create a DataRelation, and add it to the DataSet.
DataRelation theDataRelation = new DataRelation("Access View",
theRecordsIDColumn , recordID);
theDataSet.Relations.Add(theDataRelation);
//if there are records load them
if(recordSet.Length > 0)
{
//loop through the records and add a row for each
foreach(Record theRecord in recordSet)
{
//grab a new row
DataRow newRow = theTable.NewRow();
//since we need to insert a value we need to populate the
array manually
//create the temp object
object[] theObjects = new
object[theRecord.dataArray.Length+1];
//insert the value in first slot
theObjects[0] = theRecord.theID;
//copy the rest of the values into the array
for(int i = 1; i < theRecord.dataArray.Length+1; i++)
{
theObjects
= theRecord.dataArray[i-1];
}
//store all the items
newRow.ItemArray = theObjects;
//add the row to the table
theTable.Rows.Add(newRow);
//now we need to populate the accessView table
//loop through the entries in the viewer
foreach(AccessViewer.AccessEntry theEntry in
theRecord.accessViewer.entryList)
{
//start a new row
DataRow theAVRow = theAccessViewerTable.NewRow();
//create an object array and store the values
object[] theAVObjects = new object[]{theRecord.theID,
DateTime.Parse(theEntry.theDate), theEntry.theUsername, theEntry.theField,
theEntry.thePreviousValue, theEntry.theNewValue};
//store all the items
theAVRow.ItemArray = theAVObjects;
//add the row
theAccessViewerTable.Rows.Add(theAVRow);
}
}
}
else //no records so start a blank one
{
theTable.Rows.Add(theTable.NewRow());
}
theTable.AcceptChanges();
//store thedataset
Session["TheDataSet"] = theDataSet;
}
else
theDataSet = (DataSet)Session["TheDataSet"];
//TODO: Put event handlers back
//add the event handler used to save changes
//theTable.RowChanged += new
DataRowChangeEventHandler(theTableRowChanged);
//theTable.RowDeleting += new
DataRowChangeEventHandler(theTableRowDeleted);
//attach the DataSource;
DataView theView = new DataView(theDataSet.Tables["Records"]);
RecordDataGrid.DataSource = theView;
RecordDataGrid.DataBind();
}
Sam Samnah said:
Well the syntax looks correct. Maybe the problem is with your dataview
object. You set the table to the "Access Viewer" table maybe there is a
problem with your command string. You might want to paste all the data
processing information.
Dave Hagerich said:
Ok I removed the space and used
theView.RowFilter="RecordID=0";
and still get nothing
Sam Samnah said:
Maybe try theView.RowFilter="Record ID=0"
You might want to remove spaces from column names. I'm not sure but I think
some queries get confused with white space in column names. I'm not sure
though.
I tried that and during execution I get an exception saying it cant compare
System.Int32 with System.String
Also the name is 'Record ID' because the Column name has a space in it.
Your second line of code is wrong I think.
instead of
theView.RowFilter="'RecordID'='0'";
you can type
theView.RowFilter="RecordID=" + 0;
I think that should work. The zero looks like an int and should not
be
represented as a string.
Sam-
I'm using a DataGrid with a DataSet and I'm trying to filter the
data
being
displayed, using the following code as a test:
DataView theView = new DataView(theDataSet.Tables["Access Viewer"]);
theView.RowFilter = "'Record ID' = '0'";
theView.RowStateFilter = DataViewRowState.ModifiedCurrent;
Debug.WriteLine(string.Format("RowFilter = {0}",
theView.RowFilter));
RecordDataGrid.DataSource = theView;
RecordDataGrid.DataBind();
without the RowFilter set all the data comes up but with the RowFilter
set
I
get nothing. There is a column called Record ID and there are multiple
entries with an ID of 0. Any help would be appreciated.
Thanks,
Dave
