/// <devdoc>
/// </devdoc>
private ArrayList CreateAutoGeneratedColumns(PagedDataSource dataSource) {
if (dataSource == null) {
// note that we're not throwing an exception in this case, and the calling
// code should be able to handle a null arraylist being returned
return null;
}
ArrayList generatedColumns = new ArrayList();
PropertyDescriptorCollection propDescs = null;
bool throwException = true;
// try ITypedList first
// A PagedDataSource implements this, but returns null, if the underlying data source
// does not implement it.
propDescs = ((ITypedList)dataSource).GetItemProperties(new PropertyDescriptor[0]);
if (propDescs == null) {
Type sampleItemType = null;
object sampleItem = null;
IEnumerable realDataSource = dataSource.DataSource;
Debug.Assert(realDataSource != null, "Must have a real data source when calling CreateAutoGeneratedColumns");
Type dataSourceType = realDataSource.GetType();
// try for a typed Item property, which should be present on strongly typed collections
PropertyInfo itemProp = dataSourceType.GetProperty("Item", BindingFlags.Public | BindingFlags.Instance, null, null, new Type[] { typeof(int) }, null);
if (itemProp != null) {
sampleItemType = itemProp.PropertyType;
}
if ((sampleItemType == null) || (sampleItemType == typeof(object))) {
// last resort... try to get ahold of the first item by beginning the
// enumeration
IEnumerator e = dataSource.GetEnumerator();
if (e.MoveNext()) {
sampleItem = e.Current;
}
else {
// we don't want to throw an exception if we're bound to an IEnumerable
// data source with no records... we'll simply bail and not show any data
throwException = false;
}
if (sampleItem != null) {
sampleItemType = sampleItem.GetType();
}
// We must store the enumerator regardless of whether we got back an item from it
// because we cannot start the enumeration again, in the case of a DataReader.
// Code in CreateControlHierarchy must deal appropriately for the case where
// there is a stored enumerator, but a null object as the first item.
StoreEnumerator(e, sampleItem);
}
if ((sampleItem != null) && (sampleItem is ICustomTypeDescriptor)) {
// Get the custom properties of the object
propDescs = TypeDescriptor.GetProperties(sampleItem);
}
else if (sampleItemType != null) {
// directly bindable types: strings, ints etc. get treated special, since we
// don't care about their properties, but rather we care about them directly
if (BaseDataList.IsBindableType(sampleItemType)) {
BoundColumn column = new BoundColumn();
((IStateManager)column).TrackViewState();
column.HeaderText = "Item";
column.DataField = BoundColumn.thisExpr;
column.SortExpression = "Item";
column.SetOwner(this);
generatedColumns.Add(column);
}
else {
// complex type... we get its properties
propDescs = TypeDescriptor.GetProperties(sampleItemType);
}
}
}
if ((propDescs != null) && (propDescs.Count != 0)) {
foreach (PropertyDescriptor pd in propDescs) {
Type propType = pd.PropertyType;
if (BaseDataList.IsBindableType(propType)) {
BoundColumn column = new BoundColumn();
((IStateManager)column).TrackViewState();
column.HeaderText = pd.Name;
column.DataField = pd.Name;
column.SortExpression = pd.Name;
column.ReadOnly = pd.IsReadOnly;
column.SetOwner(this);
generatedColumns.Add(column);
}
}
}
if ((generatedColumns.Count == 0) && throwException) {
// this handles the case where we got back something that either had no
// properties, or all properties were not bindable.
throw new HttpException(SR.GetString(SR.DataGrid_NoAutoGenColumns, ID));
}
return generatedColumns;
}
/// <internalonly/>
/// <devdoc>
/// <para>Loads a saved state of the <see cref='System.Web.UI.WebControls.DataGrid'/>.</para>
/// </devdoc>
protected override void LoadViewState(object savedState) {
if (savedState != null) {
object[] myState = (object[])savedState;
if (myState[0] != null)
base.LoadViewState(myState[0]);
if (myState[1] != null)
((IStateManager)Columns).LoadViewState(myState[1]);
if (myState[2] != null)
((IStateManager)PagerStyle).LoadViewState(myState[2]);
if (myState[3] != null)
((IStateManager)HeaderStyle).LoadViewState(myState[3]);
if (myState[4] != null)
((IStateManager)FooterStyle).LoadViewState(myState[4]);
if (myState[5] != null)
((IStateManager)ItemStyle).LoadViewState(myState[5]);
if (myState[6] != null)
((IStateManager)AlternatingItemStyle).LoadViewState(myState[6]);
if (myState[7] != null)
((IStateManager)SelectedItemStyle).LoadViewState(myState[7]);
if (myState[8] != null)
((IStateManager)EditItemStyle).LoadViewState(myState[8]);
if (myState[9] != null)
((IStateManager)ControlStyle).LoadViewState(myState[9]);
if (myState[10] != null) {
object[] autoGenColumnState = (object[])myState[10];
int columnCount = autoGenColumnState.Length;
if (columnCount != 0)
autoGenColumnsArray = new ArrayList();
else
autoGenColumnsArray = null;
for (int i = 0; i < columnCount; i++) {
BoundColumn column = new BoundColumn();
((IStateManager)column).TrackViewState();
((IStateManager)column).LoadViewState(autoGenColumnState[i]);
column.SetOwner(this);
autoGenColumnsArray.Add(column);
}
}
}
}
protected override void LoadViewState(object savedState)
{
if (savedState == null)
return;
object [] states = (object []) savedState;
base.LoadViewState (states[0]);
if(columns != null)
((IStateManager)columns).LoadViewState(states[1]);
if(pagerStyle != null)
pagerStyle.LoadViewState(states[2]);
if(headerStyle != null)
headerStyle.LoadViewState(states[3]);
if(footerStyle != null)
footerStyle.LoadViewState(states[4]);
if(itemStyle != null)
itemStyle.LoadViewState(states[5]);
if(alternatingItemStyle != null)
alternatingItemStyle.LoadViewState(states[6]);
if(selectedItemStyle != null)
selectedItemStyle.LoadViewState(states[7]);
if(editItemStyle != null)
editItemStyle.LoadViewState(states[8]);
if (states [9] != null) {
object[] array = ((object[]) states [9]);
if (array.Length != 0)
this.autoGenColsArrayList = new ArrayList ();
else
this.autoGenColsArrayList = null;
for (int i = 0; i < array.Length; i++) {
BoundColumn column1 = new BoundColumn ();
((IStateManager)column1).TrackViewState ();
((IStateManager)column1).LoadViewState (array [i]);
column1.SetOwner (this);
this.autoGenColsArrayList.Add (column1);
}
}
}
/// <summary>
/// Generates the columns when AutoGenerateColumns is true.
/// This method is called by CreateColumnSet when dataSource
/// is to be used and columns need to be generated automatically.
/// </summary>
private ArrayList AutoCreateColumns (PagedDataSource source)
{
if (source == null)
return null;
ArrayList retVal = null;
PropertyDescriptorCollection props = source.GetItemProperties (new PropertyDescriptor [0]);
bool empty_enumerator = false;
Type prop_type;
BoundColumn col;
if (props == null) {
object fitem = null;
prop_type = null;
PropertyInfo prop_item = source.DataSource.GetType ().GetProperty ("Item",
BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public,
null, null, new Type[] { typeof(int) }, null);
if (prop_item != null)
prop_type = prop_item.PropertyType;
if (prop_type == null || prop_type == typeof (object)) {
IEnumerator en = source.GetEnumerator();
if (en.MoveNext ()) {
fitem = en.Current;
if (fitem != null)
prop_type = fitem.GetType ();
} else {
empty_enumerator = true;
}
StoreEnumerator (en, fitem);
}
if (fitem is ICustomTypeDescriptor) {
props = TypeDescriptor.GetProperties (fitem);
} else if (prop_type != null) {
if (IsBindableType (prop_type)) {
col = new BoundColumn ();
((IStateManager) col).TrackViewState ();
col.HeaderText = "Item";
col.SortExpression = "Item";
col.DataField = BoundColumn.thisExpr;
col.SetOwner (this);
if (retVal == null)
retVal = new ArrayList ();
retVal.Add (col);
} else {
props = TypeDescriptor.GetProperties (prop_type);
}
}
}
if (props != null && props.Count > 0) {
try {
foreach (PropertyDescriptor current in props) {
if (!IsBindableType (current.PropertyType))
continue;
col = new BoundColumn ();
((IStateManager) col).TrackViewState ();
string name = current.Name;
col.HeaderText = name;
col.SortExpression = name;
col.DataField = name;
col.ReadOnly = current.IsReadOnly;
col.SetOwner (this);
if (retVal == null)
retVal = new ArrayList ();
retVal.Add (col);
}
} finally {
if (props is IDisposable)
((IDisposable) props).Dispose ();
}
}
if (retVal != null && retVal.Count > 0)
return retVal;
if (empty_enumerator)
return null;
throw new HttpException (HttpRuntime.FormatResourceString ("DataGrid_NoAutoGenColumns", ID));
}
protected override void LoadViewState(object savedState)
{
if (savedState != null)
{
object[] objArray = (object[]) savedState;
if (objArray[0] != null)
{
base.LoadViewState(objArray[0]);
}
if (objArray[1] != null)
{
((IStateManager) this.Columns).LoadViewState(objArray[1]);
}
if (objArray[2] != null)
{
((IStateManager) this.PagerStyle).LoadViewState(objArray[2]);
}
if (objArray[3] != null)
{
((IStateManager) this.HeaderStyle).LoadViewState(objArray[3]);
}
if (objArray[4] != null)
{
((IStateManager) this.FooterStyle).LoadViewState(objArray[4]);
}
if (objArray[5] != null)
{
((IStateManager) this.ItemStyle).LoadViewState(objArray[5]);
}
if (objArray[6] != null)
{
((IStateManager) this.AlternatingItemStyle).LoadViewState(objArray[6]);
}
if (objArray[7] != null)
{
((IStateManager) this.SelectedItemStyle).LoadViewState(objArray[7]);
}
if (objArray[8] != null)
{
((IStateManager) this.EditItemStyle).LoadViewState(objArray[8]);
}
if (objArray[9] != null)
{
((IStateManager) base.ControlStyle).LoadViewState(objArray[9]);
}
if (objArray[10] != null)
{
object[] objArray2 = (object[]) objArray[10];
int length = objArray2.Length;
if (length != 0)
{
this.autoGenColumnsArray = new ArrayList();
}
else
{
this.autoGenColumnsArray = null;
}
for (int i = 0; i < length; i++)
{
BoundColumn column = new BoundColumn();
((IStateManager) column).TrackViewState();
((IStateManager) column).LoadViewState(objArray2[i]);
column.SetOwner(this);
this.autoGenColumnsArray.Add(column);
}
}
}
}
private ArrayList CreateAutoGeneratedColumns(PagedDataSource dataSource)
{
if (dataSource == null)
{
return null;
}
ArrayList list = new ArrayList();
PropertyDescriptorCollection itemProperties = null;
bool flag = true;
itemProperties = dataSource.GetItemProperties(new PropertyDescriptor[0]);
if (itemProperties == null)
{
Type propertyType = null;
object firstDataItem = null;
PropertyInfo info = dataSource.DataSource.GetType().GetProperty("Item", BindingFlags.Public | BindingFlags.Instance, null, null, new Type[] { typeof(int) }, null);
if (info != null)
{
propertyType = info.PropertyType;
}
if ((propertyType == null) || (propertyType == typeof(object)))
{
IEnumerator enumerator = dataSource.GetEnumerator();
if (enumerator.MoveNext())
{
firstDataItem = enumerator.Current;
}
else
{
flag = false;
}
if (firstDataItem != null)
{
propertyType = firstDataItem.GetType();
}
this.StoreEnumerator(enumerator, firstDataItem);
}
if ((firstDataItem != null) && (firstDataItem is ICustomTypeDescriptor))
{
itemProperties = TypeDescriptor.GetProperties(firstDataItem);
}
else if (propertyType != null)
{
if (BaseDataList.IsBindableType(propertyType))
{
BoundColumn column = new BoundColumn();
((IStateManager) column).TrackViewState();
column.HeaderText = "Item";
column.DataField = BoundColumn.thisExpr;
column.SortExpression = "Item";
column.SetOwner(this);
list.Add(column);
}
else
{
itemProperties = TypeDescriptor.GetProperties(propertyType);
}
}
}
if ((itemProperties != null) && (itemProperties.Count != 0))
{
foreach (PropertyDescriptor descriptor in itemProperties)
{
if (BaseDataList.IsBindableType(descriptor.PropertyType))
{
BoundColumn column2 = new BoundColumn();
((IStateManager) column2).TrackViewState();
column2.HeaderText = descriptor.Name;
column2.DataField = descriptor.Name;
column2.SortExpression = descriptor.Name;
column2.ReadOnly = descriptor.IsReadOnly;
column2.SetOwner(this);
list.Add(column2);
}
}
}
if ((list.Count == 0) && flag)
{
throw new HttpException(System.Web.SR.GetString("DataGrid_NoAutoGenColumns", new object[] { this.ID }));
}
return list;
}
