controlcollection | 易学教程

ControlCollection items could not be saved

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问题 I have created a control with controlcollection. When I add items from the property window at design time. It added perfectly. Also when I open it back. Added items shows me. But, When I close the form then open it again the items was removed. Now I have added two Items in the collection. The items was looking perfectly. But, When I open the Form.Desigern.cs file the following line is missing. this.xWizardControl.Window.Controls.Add(this.xWizardPage1); this.xWizardControl.Window.Controls.Add

Enumerating Collections that are not inherently IEnumerable?

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问题 When you want to recursively enumerate a hierarchical object, selecting some elements based on some criteria, there are numerous examples of techniques like "flattening" and then filtering using Linq : like those found here : link text But, when you are enumerating something like the Controls collection of a Form, or the Nodes collection of a TreeView, I have been unable to use these types of techniques because they seem to require an argument (to the extension method) which is an IEnumerable

Will Microsoft ever make all collections useable by LINQ?

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问题 I've been using LINQ for awhile (and enjoy it), but it feels like I hit a speedbump when I run across .NET specialized collections(DataRowCollection, ControlCollection). Is there a way to use LINQ with these specialized controls, and if not do you think Microsoft will address this in the next release of the framework? Or are we left to iterate over these the non-LINQ way, or pull the items out of the collection into LINQ-able collections ourselves? 回答1: The reason why collections like

Using C# to recursively get a collection of controls from a controlcollection

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问题 Currently I am trying to extract a collection of dynamically created controls (checkboxes and dropdownlists) from a recursive control collection (repeater). This is the code I am using. private void GetControlList<T>(ControlCollection controlCollection, ref List<T> resultCollection) { foreach (Control control in controlCollection) { if (control.GetType() == typeof(T)) resultCollection.Add((T)control); if (control.HasControls()) GetControlList(controlCollection, ref resultCollection); } } I am

Enumerating Collections that are not inherently IEnumerable?

阅读更多关于 Enumerating Collections that are not inherently IEnumerable?

When you want to recursively enumerate a hierarchical object, selecting some elements based on some criteria, there are numerous examples of techniques like "flattening" and then filtering using Linq : like those found here : link text But, when you are enumerating something like the Controls collection of a Form, or the Nodes collection of a TreeView, I have been unable to use these types of techniques because they seem to require an argument (to the extension method) which is an IEnumerable collection : passing in SomeForm.Controls does not compile. The most useful thing I found was this :