C# TextBox.BringToFront方法代码示例

//.........这里部分代码省略.........

            buttons[c].Location = new Point(x, y);
            workingArea.Controls.Add(buttons[c]);
        }

        #endregion

        #region Filename label
        //define the label
        Font filenameFont = new Font("Arial", 10, FontStyle.Bold);
        Label filenameLabel = new Label() {
            Text = "Filename:",
            Font = filenameFont
        };

        //define the location of the label to be at the beginning and centered
        //vertically.
        int filenameX = padding;
        int filenameY = (workingArea.Height - inputRegionHeight) +
                        (inputRegionHeight / 2) - (((int)filenameFont.GetHeight() + 1) / 2);
        filenameLabel.Location = new Point(filenameX, filenameY);
        workingArea.Controls.Add(filenameLabel);

        //calculate the end position x position of the label
        //so we know were to position the text box
        int filenameEndX = 75;//filenameLabel.Width + (padding * 2);
        #endregion

        #region Filename text box
        TextBox filenameTextBox = new TextBox() {
            BorderStyle = BorderStyle.FixedSingle,
            Text = "New file"
        };

        //position the text box in the middle of the input region
        int txtX = filenameEndX;
        int txtY = (workingArea.Height - inputRegionHeight) +
                   (inputRegionHeight / 2) - (filenameTextBox.Height / 2);
        filenameTextBox.Location = new Point(txtX, txtY);

        //stretch the width of the text box
        filenameTextBox.Width =
            workingArea.Width - currentButtonX - filenameEndX - padding;

        //add the text box
        workingArea.Controls.Add(filenameTextBox);
        filenameTextBox.BringToFront();
        #endregion

        bool cancelled = true;

        /*Define the events for the buttons and text box*/
        cancelButton.Click += delegate(object sender, EventArgs e) { form.Close(); };
        addButton.Click += delegate(object sender, EventArgs e) { validate(filenameTextBox, form, ref cancelled); };
        list.KeyDown += delegate(object sender, KeyEventArgs e) {
            if (e.KeyCode == Keys.Escape) { form.Close(); }
        };
        filenameTextBox.KeyDown += delegate(object sender, KeyEventArgs e) {
            if (e.KeyCode == Keys.Enter) { validate(filenameTextBox, form, ref cancelled); }
            if (e.KeyCode == Keys.Escape) { form.Close(); }
        };

        /*Define the selection change event for the list so that
          when the user selects an item, it automatically adds
          the extension in filename*/
        list.ItemSelectionChanged += delegate(object sender, ListViewItemSelectionChangedEventArgs e) {
            if (e.Item == null) { return; }

            //define the new extesion
            string newExt = (string)e.Item.Tag;

            //add the extension to the filename
            string[] fileSplit = filenameTextBox.Text.Split('.');
            if (fileSplit.Length == 1) {
                Array.Resize(ref fileSplit, fileSplit.Length + 1);
            }
            fileSplit[fileSplit.Length - 1] = newExt;

            //new extension is blank?
            if (newExt == "") {
                Array.Resize(ref fileSplit, fileSplit.Length - 1);
            }

            //set the new filename
            filenameTextBox.Text = Helpers.Flatten(fileSplit, ".");
        };

        /*Define tab indexes*/
        filenameTextBox.TabIndex = 0;
        cancelButton.TabIndex = 1;
        addButton.TabIndex = 2;
        list.TabIndex = 3;

        //show the form and await user interaction.
        form.ShowDialog();

        //return what the filename was if the user didnt cancel
        //the dialog.
        return (cancelled ? null : filenameTextBox.Text);
    }