本文整理汇总了C#中System.Web.UI.WebControls.HierarchicalDataBoundControl.GetData方法的典型用法代码示例。如果您正苦于以下问题：C# HierarchicalDataBoundControl.GetData方法的具体用法？C# HierarchicalDataBoundControl.GetData怎么用？C# HierarchicalDataBoundControl.GetData使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Web.UI.WebControls.HierarchicalDataBoundControl的用法示例。
在下文中一共展示了HierarchicalDataBoundControl.GetData方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: PerformDataBinding
protected override void PerformDataBinding() {
base.PerformDataBinding();
// Do not attempt to bind data if there is no
// data source set.
if (!IsBoundUsingDataSourceID && (DataSource == null)) {
return;
}
HierarchicalDataSourceView view = GetData(RootNode.DataPath);
if (view == null) {
throw new InvalidOperationException
("No view returned by data source control.");
}
IHierarchicalEnumerable enumerable = view.Select();
if (enumerable != null) {
Nodes.Clear();
try {
RecurseDataBindInternal(RootNode, enumerable, 1);
}
finally {
}
}
}
private void RecurseDataBindInternal(TreeNode node,
IHierarchicalEnumerable enumerable, int depth) {
foreach(object item in enumerable) {
IHierarchyData data = enumerable.GetHierarchyData(item);
if (null != data) {
// Create an object that represents the bound data
// to the control.
TreeNode newNode = new TreeNode();
RootViewNode rvnode = new RootViewNode();
rvnode.Node = newNode;
rvnode.Depth = depth;
// The dataItem is not just a string, but potentially
// an XML node or some other container.
// If DataTextField is set, use it to determine which
// field to render. Otherwise, use the first field.
if (DataTextField.Length > 0) {
newNode.Text = DataBinder.GetPropertyValue
(data, DataTextField, null);
}
else {
PropertyDescriptorCollection props =
TypeDescriptor.GetProperties(data);
// Set the "default" value of the node.
newNode.Text = String.Empty;
// Set the true data-bound value of the TextBox,
// if possible.
if (props.Count >= 1) {
if (null != props[0].GetValue(data)) {
newNode.Text =
props[0].GetValue(data).ToString();
}
}
}
Nodes.Add(rvnode);
if (data.HasChildren) {
IHierarchicalEnumerable newEnumerable =
data.GetChildren();
if (newEnumerable != null) {
RecurseDataBindInternal(newNode,
newEnumerable, depth+1 );
}
}
if ( _maxDepth < depth) _maxDepth = depth;
}
}
}