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Figure 21-18. Proportional resizing To implement this design, follow these steps: 1. Add a TableLayoutPanel. Define the basic structure by setting RowCount to 1 and ColumnCount to 2. 2. Size the TableLayoutPanel to fill most of the form, and then set its Anchor property so it s anchored to all four sides of the form and will grow as the form is resized. 3. Add a control on each side (such as a TreeView on the left and ListView on the right). Set the Dock property of each control to Fill. If you wanted to add multiple controls, you would use Panel controls instead and add anchored controls inside each panel.

4. Edit the ColumnStyles collection of the TableLayoutPanel (which is exposed in the Properties window as the Columns collection) so that each column uses SizeType.Percent. You can then choose appropriate percentages (in this example the space is split with the 50 percent columns).

Figure 14-12. Compiling a PL/SQL stored procedure You might want to intentionally write an incorrect SQL statement so that you know the compile feature is doing its job. When you compile the incorrect stored procedure, you should see errors being thrown in the Visual Studio IDE. These errors provide precise detail down to the exact line number where the error occurred. You can see this in Figure 14-13.

Root node (non-leaf node)

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The TableLayoutPanel makes great sense for columns of settings that need to be laid out in a grid. To model this sort of window, you could use a two-column TableLayoutPanel with labels on the left and an input control (text box, drop-down list box, etc.) on the right. The label column should size to fit the largest label. The text box column should fill all the remaining space. Figure 21-19 shows an example.

The ODT.NET tool set makes it easier than ever to create PL/SQL stored procedures and functions the same way. In the next section, we will take a look at creating a PL/SQL package.

To find records that have a key value of 50, the database server queries the root node until it finds a key value equal to or greater than 50, and then follows the pointer to the child leaf node This leaf contains pointers to the data page(s) where the records matching key = 50 can be found Tree indexes have a few universal characteristics The height (h) of the tree refers to the number of levels of leaf or non-leaf pages Additionally, nodes can have a minimum and maximum number of keys associated with them Traditionally, the minimum number of keys is called the minimization factor (t), and the maximum is sometimes called the order, or branching factor (n) A specialized type of tree index structure is known as B-tree, which commonly means balanced tree.

Figure 21-19. A list of settings To implement this design, follow these steps: 1. Add a TableLayoutPanel. Define the basic structure by setting RowCount to 1 and ColumnCount to 2. 2. Size the TableLayoutPanel to fill most of the form, and then set its Anchor property so it s anchored to all four sides of the form and will grow as the form is resized. Don t add any controls instead, the labels and buttons will be inserted programmatically. 3. Edit the ColumnStyles collection of the TableLayoutPanel. The first column should use AutoSize resizing mode so that it grows to fit the largest label. The sizing mode for the second column isn t important, as it will automatically be sized to fit whatever space remains.

4. Edit the RowStyles collection of the TableLayoutPanel. Set the first (and only) row to AutoSize resizing mode. Now you can insert the controls when the form loads. In this example, the controls are hard-coded, but you could easily generate them based on the information in a database or file (as demonstrated later in this chapter): private void Form_Load(object sender, EventArgs e) { // Reduce the number of times the layout logic is executed. tableLayoutPanel1.SuspendLayout(); // Add the controls. for (int i=1; i<15; i++) { // Create an autosizing label for the left column. Label lbl = new Label(); lbl.Text = "This is Setting " + i.ToString(); lbl.AutoSize = true; lbl.Margin = new Padding(3, 7, 3, 3); // Create a text box that's docked to fill up the entire second column. TextBox txt = new TextBox(); txt.Dock = DockStyle.Fill; // Add the controls tableLayoutPanel1.Controls.Add(lbl); tableLayoutPanel1.Controls.Add(txt); } tableLayoutPanel1.ResumeLayout(); }

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