...using Infragistics2.Win.UltraWinGrid.v9.2

When I initially load the grid for the first time (the first time that grid.DataBind() is ever called) the header checkbox's state is Indeterminate and it displays as a greyed out checkbox.  This even though the checkbox in the bound column is always false.

I've created a very simple winform to verify this behavior and in that case the checbox begins in an unchecked state just as I'd expect it to: so clearly I'm doing something to cause this behavior, but I have no idea what.

...some data

#region Grid Events

///

/// Handles the MouseDown event of the ugRecvGrid control.
///
///The source of the event.
///The instance containing the event data.
void ugRecvGrid_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
UltraGrid ug = (UltraGrid)sender;
ExportGridExcelEvent(ug, "Receivables");
}
}

private void ugRecvGrid_AfterHeaderCheckStateChanged(object sender, AfterHeaderCheckStateChangedEventArgs e)
{
if (e.Rows != null && e.Rows.Count > 0)
{
this.Cursor = Cursors.WaitCursor;
//I removed the synchronization cause that would cause this method to get called everytime a change was made in
//one of the rows
CheckState currentCheckState = e.Column.GetHeaderCheckedState(e.Rows);
if (currentCheckState != CheckState.Indeterminate)
{
var receivableObjs = e.Rows.Select(r => r.ListObject as ReceivablesDTO).ToArray();

bool willcontinue = true;
string action = (currentCheckState == CheckState.Checked ? "Adding" : "Removing");
if (receivableObjs.Length > 100 && currentCheckState == CheckState.Checked)
{
string title = string.Format("Adding claims for {0:g} recoveries",receivableObjs.Length);
willcontinue = MessageBox.Show("This could take a long a long time.\nContinue?", title, MessageBoxButtons.YesNo) == DialogResult.Yes;
}
if (willcontinue)
{
using (FrmProgress.Show("Retrieving claims...", receivableObjs.Length, false))
{
for (int i = 0; i < receivableObjs.Length; i++)
{
FrmProgress.UpdateMeter(i + 1);
//var cell = row.Cells["IsChecked"];
switch (currentCheckState)
{
case CheckState.Checked:
receivableObjs[i].IsChecked = true;
break;
case CheckState.Unchecked:
receivableObjs[i].IsChecked = false;
break;
}

AddOrRemoveRows(receivableObjs[i].IsChecked, receivableObjs[i]);

}
}
}

}
this.Cursor = Cursors.Default;
}
}

private void ugRecvGrid_CellChange(object sender, CellEventArgs e)
{
//the other CheckStates are handled by ugRecvGrid_AfterHeaderCheckStateChanged
if (e.Cell.Column.GetHeaderCheckedState(e.Cell.Row.ParentCollection) == CheckState.Indeterminate)
{
this.Cursor = Cursors.WaitCursor;
if (e.Cell.Column.Key.Equals("IsChecked"))
{
var rcv = e.Cell.Row.ListObject as ReceivablesDTO;
bool add = false;
bool.TryParse(e.Cell.Text, out add);
//toggle the isChecked value based on the
rcv.IsChecked = add;
AddOrRemoveRows(add, rcv);
}
this.Cursor = Cursors.Default;
}
}

private void ugRecvGrid_InitializeLayout(object sender, InitializeLayoutEventArgs e)
{

//Display a checkbox in the column header, where column's data type isBoolean,DefaultableBoolean, or Nullable Boolean.
var selectorColumn = e.Layout.Bands[0].Columns["IsChecked"];

if (selectorColumn != null)
{
selectorColumn.Header.CheckBoxVisibility = HeaderCheckBoxVisibility.WhenUsingCheckEditor;
//Aligns the Header checkbox to the right of the Header caption
selectorColumn.Header.CheckBoxAlignment = HeaderCheckBoxAlignment.Right;
//The checkbox and the cell values are kept in synch to affect only the RowsCollection
selectorColumn.Header.CheckBoxSynchronization = HeaderCheckBoxSynchronization.RowsCollection;
selectorColumn.Header.VisiblePosition = 0;
this.ugRecvGrid.DisplayLayout.Bands[0].Override.RowSelectors = DefaultableBoolean.False;
}
if (e.Layout.Bands[0].Summaries == null || e.Layout.Bands[0].Summaries.Count == 0)
SetSummary();
}

///

/// Creates a summary band with totals and row count
private void SetSummary()
{
UltraGridColumn columnToSummarize;
SummarySettings summary;

//PostedAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["PostedAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("PostedAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//AdjustedAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["AdjustedAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("AdjustedAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//WriteOffAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["WriteOffAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("WriteOffAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//ExpGrossAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["ExpGrossAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("ExpGrossAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//ExpFeeAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["ExpFeeAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("ExpFeeAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//AllocatedAmt
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["AllocatedAmt"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("AllocatedAmt", SummaryType.Sum, columnToSummarize);
summary.DisplayFormat = "{0:c}";
summary.Appearance.TextHAlign = HAlign.Center;

//row count
columnToSummarize = ugRecvGrid.DisplayLayout.Bands[0].Columns["RecvStatusDesc"];

summary = ugRecvGrid.DisplayLayout.Bands[0].Summaries.Add("RecvStatusDesc", SummaryType.Count, columnToSummarize);
summary.DisplayFormat = "{0:n0}";
summary.Appearance.TextHAlign = HAlign.Center;

ugRecvGrid.DisplayLayout.Bands[0].SummaryFooterCaption = "Totals:";
ugRecvGrid.DisplayLayout.Bands.Layout.Override.SummaryFooterCaptionAppearance.BackColor = Color.DarkSlateBlue;
ugRecvGrid.DisplayLayout.Bands.Layout.Override.SummaryFooterCaptionAppearance.ForeColor = Color.White;
ugRecvGrid.DisplayLayout.Bands.Layout.Override.SummaryDisplayArea = SummaryDisplayAreas.BottomFixed;
}

#endregion