/// <internalonly/>
/// <devdoc>
/// <para>Creates the control hierarchy that is used to render the DataGrid.
/// This is called whenever a control hierarchy is needed and the
/// ChildControlsCreated property is false.
/// The implementation assumes that all the children in the controls
/// collection have already been cleared.</para>
/// </devdoc>
protected override void CreateControlHierarchy(bool useDataSource) {
pagedDataSource = CreatePagedDataSource();
IEnumerator dataSource = null;
int count = -1;
int totalCount = -1;
ArrayList keysArray = DataKeysArray;
ArrayList columnsArray = null;
if (itemsArray != null) {
itemsArray.Clear();
}
else {
itemsArray = new ArrayList();
}
itemsCollection = null;
if (useDataSource == false) {
// ViewState must have a non-null value for ItemCount because we check for
// this in CreateChildControls
count = (int)ViewState[BaseDataList.ItemCountViewStateKey];
totalCount = (int)ViewState[DataSourceItemCountViewStateKey];
if (count != -1) {
if (pagedDataSource.IsCustomPagingEnabled) {
pagedDataSource.DataSource = new DummyDataSource(count);
}
else {
pagedDataSource.DataSource = new DummyDataSource(totalCount);
}
dataSource = pagedDataSource.GetEnumerator();
columnsArray = CreateColumnSet(null, false);
itemsArray.Capacity = count;
}
}
else {
keysArray.Clear();
IEnumerable realDataSource = GetData();
if (realDataSource != null) {
ICollection collection = realDataSource as ICollection;
if ((collection == null) &&
pagedDataSource.IsPagingEnabled && !pagedDataSource.IsCustomPagingEnabled) {
throw new HttpException(SR.GetString(SR.DataGrid_Missing_VirtualItemCount, ID));
}
pagedDataSource.DataSource = realDataSource;
if (pagedDataSource.IsPagingEnabled) {
if ((pagedDataSource.CurrentPageIndex < 0) || (pagedDataSource.CurrentPageIndex >= pagedDataSource.PageCount)) {
throw new HttpException(SR.GetString(SR.Invalid_CurrentPageIndex));
}
}
columnsArray = CreateColumnSet(pagedDataSource, useDataSource);
if (storedDataValid) {
dataSource = storedData;
}
else {
dataSource = pagedDataSource.GetEnumerator();
}
if (collection != null) {
int initialCapacity = pagedDataSource.Count;
keysArray.Capacity = initialCapacity;
itemsArray.Capacity = initialCapacity;
}
}
}
int columnCount = 0;
if (columnsArray != null)
columnCount = columnsArray.Count;
if (columnCount > 0) {
DataGridColumn[] displayColumns = new DataGridColumn[columnCount];
columnsArray.CopyTo(displayColumns, 0);
Table table = new ChildTable(String.IsNullOrEmpty(ID) ? null : ClientID);
Controls.Add(table);
for (int c = 0; c < displayColumns.Length; c++) {
displayColumns[c].Initialize();
}
TableRowCollection rows = table.Rows;
DataGridItem item;
ListItemType itemType;
int index = 0;
int dataSetIndex = 0;
string keyField = DataKeyField;
bool storeKeys = (useDataSource && (keyField.Length != 0));
bool createPager = pagedDataSource.IsPagingEnabled;
int editItemIndex = EditItemIndex;
int selectedItemIndex = SelectedIndex;
if (pagedDataSource.IsPagingEnabled)
dataSetIndex = pagedDataSource.FirstIndexInPage;
count = 0;
if (createPager) {
// top pager
CreateItem(-1, -1, ListItemType.Pager, false, null, displayColumns, rows, pagedDataSource);
}
CreateItem(-1, -1, ListItemType.Header, useDataSource, null, displayColumns, rows, null);
if (storedDataValid && (firstDataItem != null)) {
if (storeKeys) {
object keyValue = DataBinder.GetPropertyValue(firstDataItem, keyField);
keysArray.Add(keyValue);
}
itemType = ListItemType.Item;
if (index == editItemIndex)
itemType = ListItemType.EditItem;
else if (index == selectedItemIndex)
itemType = ListItemType.SelectedItem;
item = CreateItem(0, dataSetIndex, itemType, useDataSource, firstDataItem, displayColumns, rows, null);
itemsArray.Add(item);
count++;
index++;
dataSetIndex++;
storedDataValid = false;
firstDataItem = null;
}
while (dataSource.MoveNext()) {
object dataItem = dataSource.Current;
if (storeKeys) {
object keyValue = DataBinder.GetPropertyValue(dataItem, keyField);
keysArray.Add(keyValue);
}
itemType = ListItemType.Item;
if (index == editItemIndex)
itemType = ListItemType.EditItem;
else if (index == selectedItemIndex)
itemType = ListItemType.SelectedItem;
else if (index % 2 != 0) {
itemType = ListItemType.AlternatingItem;
}
item = CreateItem(index, dataSetIndex, itemType, useDataSource, dataItem, displayColumns, rows, null);
itemsArray.Add(item);
count++;
dataSetIndex++;
index++;
}
CreateItem(-1, -1, ListItemType.Footer, useDataSource, null, displayColumns, rows, null);
if (createPager) {
// bottom pager
CreateItem(-1, -1, ListItemType.Pager, false, null, displayColumns, rows, pagedDataSource);
}
}
if (useDataSource) {
// save the number of items and pages contained in the DataGrid for use in round-trips
if (dataSource != null) {
ViewState[BaseDataList.ItemCountViewStateKey] = count;
if (pagedDataSource.IsPagingEnabled) {
ViewState["PageCount"] = pagedDataSource.PageCount;
ViewState[DataSourceItemCountViewStateKey] = pagedDataSource.DataSourceCount;
}
else {
ViewState["PageCount"] = 1;
ViewState[DataSourceItemCountViewStateKey] = count;
}
}
else {
ViewState[BaseDataList.ItemCountViewStateKey] = -1;
ViewState[DataSourceItemCountViewStateKey] = -1;
ViewState["PageCount"] = 0;
}
}
pagedDataSource = null;
}
protected override void CreateControlHierarchy(bool useDataSource)
{
this.pagedDataSource = this.CreatePagedDataSource();
IEnumerator storedData = null;
int dataItemCount = -1;
int num2 = -1;
ArrayList dataKeysArray = base.DataKeysArray;
ArrayList list2 = null;
if (this.itemsArray != null)
{
this.itemsArray.Clear();
}
else
{
this.itemsArray = new ArrayList();
}
this.itemsCollection = null;
if (!useDataSource)
{
dataItemCount = (int) this.ViewState["_!ItemCount"];
num2 = (int) this.ViewState["_!DataSourceItemCount"];
if (dataItemCount != -1)
{
if (this.pagedDataSource.IsCustomPagingEnabled)
{
this.pagedDataSource.DataSource = new DummyDataSource(dataItemCount);
}
else
{
this.pagedDataSource.DataSource = new DummyDataSource(num2);
}
storedData = this.pagedDataSource.GetEnumerator();
list2 = this.CreateColumnSet(null, false);
this.itemsArray.Capacity = dataItemCount;
}
}
else
{
dataKeysArray.Clear();
IEnumerable data = this.GetData();
if (data != null)
{
ICollection is2 = data as ICollection;
if (((is2 == null) && this.pagedDataSource.IsPagingEnabled) && !this.pagedDataSource.IsCustomPagingEnabled)
{
throw new HttpException(System.Web.SR.GetString("DataGrid_Missing_VirtualItemCount", new object[] { this.ID }));
}
this.pagedDataSource.DataSource = data;
if (this.pagedDataSource.IsPagingEnabled && ((this.pagedDataSource.CurrentPageIndex < 0) || (this.pagedDataSource.CurrentPageIndex >= this.pagedDataSource.PageCount)))
{
throw new HttpException(System.Web.SR.GetString("Invalid_CurrentPageIndex"));
}
list2 = this.CreateColumnSet(this.pagedDataSource, useDataSource);
if (this.storedDataValid)
{
storedData = this.storedData;
}
else
{
storedData = this.pagedDataSource.GetEnumerator();
}
if (is2 != null)
{
int count = this.pagedDataSource.Count;
dataKeysArray.Capacity = count;
this.itemsArray.Capacity = count;
}
}
}
int num4 = 0;
if (list2 != null)
{
num4 = list2.Count;
}
if (num4 > 0)
{
DataGridItem item;
ListItemType editItem;
DataGridColumn[] array = new DataGridColumn[num4];
list2.CopyTo(array, 0);
Table child = new ChildTable(string.IsNullOrEmpty(this.ID) ? null : this.ClientID);
this.Controls.Add(child);
for (int i = 0; i < array.Length; i++)
{
array[i].Initialize();
}
TableRowCollection rows = child.Rows;
int itemIndex = 0;
int dataSourceIndex = 0;
string dataKeyField = this.DataKeyField;
bool flag = useDataSource && (dataKeyField.Length != 0);
bool isPagingEnabled = this.pagedDataSource.IsPagingEnabled;
int editItemIndex = this.EditItemIndex;
int selectedIndex = this.SelectedIndex;
if (this.pagedDataSource.IsPagingEnabled)
{
dataSourceIndex = this.pagedDataSource.FirstIndexInPage;
}
dataItemCount = 0;
if (isPagingEnabled)
{
this.CreateItem(-1, -1, ListItemType.Pager, false, null, array, rows, this.pagedDataSource);
}
this.CreateItem(-1, -1, ListItemType.Header, useDataSource, null, array, rows, null);
if (this.storedDataValid && (this.firstDataItem != null))
{
if (flag)
{
object propertyValue = DataBinder.GetPropertyValue(this.firstDataItem, dataKeyField);
dataKeysArray.Add(propertyValue);
}
editItem = ListItemType.Item;
if (itemIndex == editItemIndex)
{
editItem = ListItemType.EditItem;
}
else if (itemIndex == selectedIndex)
{
editItem = ListItemType.SelectedItem;
}
item = this.CreateItem(0, dataSourceIndex, editItem, useDataSource, this.firstDataItem, array, rows, null);
this.itemsArray.Add(item);
dataItemCount++;
itemIndex++;
dataSourceIndex++;
this.storedDataValid = false;
this.firstDataItem = null;
}
while (storedData.MoveNext())
{
object current = storedData.Current;
if (flag)
{
object obj4 = DataBinder.GetPropertyValue(current, dataKeyField);
dataKeysArray.Add(obj4);
}
editItem = ListItemType.Item;
if (itemIndex == editItemIndex)
{
editItem = ListItemType.EditItem;
}
else if (itemIndex == selectedIndex)
{
editItem = ListItemType.SelectedItem;
}
else if ((itemIndex % 2) != 0)
{
editItem = ListItemType.AlternatingItem;
}
item = this.CreateItem(itemIndex, dataSourceIndex, editItem, useDataSource, current, array, rows, null);
this.itemsArray.Add(item);
dataItemCount++;
dataSourceIndex++;
itemIndex++;
}
this.CreateItem(-1, -1, ListItemType.Footer, useDataSource, null, array, rows, null);
if (isPagingEnabled)
{
this.CreateItem(-1, -1, ListItemType.Pager, false, null, array, rows, this.pagedDataSource);
}
}
if (useDataSource)
{
if (storedData != null)
{
this.ViewState["_!ItemCount"] = dataItemCount;
if (this.pagedDataSource.IsPagingEnabled)
{
this.ViewState["PageCount"] = this.pagedDataSource.PageCount;
this.ViewState["_!DataSourceItemCount"] = this.pagedDataSource.DataSourceCount;
}
else
{
this.ViewState["PageCount"] = 1;
this.ViewState["_!DataSourceItemCount"] = dataItemCount;
}
}
else
{
this.ViewState["_!ItemCount"] = -1;
this.ViewState["_!DataSourceItemCount"] = -1;
this.ViewState["PageCount"] = 0;
}
}
this.pagedDataSource = null;
}