TreeView::ShowRootLines Property
.NET Framework (current version)
Gets or sets a value indicating whether lines are drawn between the tree nodes that are at the root of the tree view.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Property Value
Type: System::Booleantrue if lines are drawn between the tree nodes that are at the root of the tree view; otherwise, false. The default is true.
If the ShowRootLines property is false, the plus-sign and minus-sign buttons will not appear next to the root tree nodes, and the ShowPlusMinus property will have no effect.
The following code example demonstrates how to use the BorderStyle enumeration and the BorderStyle, ShowLines, Scrollable, HideSelection and ShowRootLines properties. To run this example, paste the following code in a form and call the InitializeTreeView method in the form's constructor or Load method.
// Declare the TreeView control. internal: System::Windows::Forms::TreeView^ TreeView1; private: // Initialize the TreeView to blend with the form, giving it the // same color as the form and no border. void InitializeTreeView() { // Create a new TreeView control and set the location and size. this->TreeView1 = gcnew System::Windows::Forms::TreeView; this->TreeView1->Location = System::Drawing::Point( 72, 48 ); this->TreeView1->Size = System::Drawing::Size( 200, 200 ); // Set the BorderStyle property to none, the BackColor property to // the form's backcolor, and the Scrollable property to false. // This allows the TreeView to blend in form. this->TreeView1->BorderStyle = BorderStyle::None; this->TreeView1->BackColor = this->BackColor; this->TreeView1->Scrollable = false; // Set the HideSelection property to false to keep the // selection highlighted when the user leaves the control. // This helps it blend with form. this->TreeView1->HideSelection = false; // Set the ShowRootLines and ShowLines properties to false to // give the TreeView a list-like appearance. this->TreeView1->ShowRootLines = false; this->TreeView1->ShowLines = false; // Add the nodes. array<TreeNode^>^temp0 = {gcnew TreeNode( "Full Color" ),gcnew TreeNode( "Project Wizards" ),gcnew TreeNode( "Visual C# and Visual Basic Support" )}; array<TreeNode^>^temp1 = {gcnew TreeNode( "Pentium 133 MHz or faster processor " ),gcnew TreeNode( "Windows 98 or later" ),gcnew TreeNode( "100 MB Disk space" )}; array<TreeNode^>^temp2 = {gcnew TreeNode( "Features",temp0 ),gcnew TreeNode( "System Requirements",temp1 )}; this->TreeView1->Nodes->AddRange( temp2 ); // Set the tab index and add the TreeView to the form. this->TreeView1->TabIndex = 0; this->Controls->Add( this->TreeView1 ); }
.NET Framework
Available since 1.1
Available since 1.1
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