C# Button.PerformLayout方法代码示例

//.........这里部分代码省略.........
                {
                    MessageBox.Show(
                        null,
                        "Paint.NET has detected that some important installation files are missing. Repairing " +
                        "this requires administrator privilege. Please run the 'PdnRepair.exe' program in the installation " +
                        "directory after logging in with a user that has administrator privilege." + Environment.NewLine +
                        Environment.NewLine +
                        "The missing files are: " + missingFilesSB.ToString(),
                        "Paint.NET",
                        MessageBoxButtons.OK,
                        MessageBoxIcon.Error);

                    return false;
                }

                const int hMargin = 8;
                const int vMargin = 8;
                Form form = new Form();
                form.Text = "Paint.NET";
                form.ClientSize = new Size(400, 10);
                form.StartPosition = FormStartPosition.CenterScreen;

                Label infoLabel = new Label();
                form.Controls.Add(infoLabel);
                infoLabel.Text =
                    "Paint.NET has detected that some important installation files are missing. If you click " +
                    "the Repair button it will attempt to repair this and then continue loading." + Environment.NewLine +
                    Environment.NewLine +
                    "The missing files are: " + missingFilesSB.ToString();

            #if DEBUG
                infoLabel.Text += Environment.NewLine +
                    "Since this is a DEBUG build, you should probably add /skipRepairAttempt to the command-line.";
            #endif

                infoLabel.Location = new Point(hMargin, vMargin);
                infoLabel.Width = form.ClientSize.Width - hMargin * 2;
                infoLabel.Height = infoLabel.GetPreferredSize(new Size(infoLabel.Width, 1)).Height;

                Button repairButton = new Button();
                form.Controls.Add(repairButton);
                repairButton.Text = "&Repair";

                Exception exception = null;

                repairButton.Click +=
                    delegate(object sender, EventArgs e)
                    {
                        form.DialogResult = DialogResult.Yes;
                        repairButton.Enabled = false;

                        try
                        {
                            Shell.Execute(form, "PdnRepair.exe", "/noPause", false, ExecuteWaitType.WaitForExit);
                        }

                        catch (Exception ex)
                        {
                            exception = ex;
                        }
                    };

                repairButton.AutoSize = true;
                repairButton.PerformLayout();
                repairButton.Width += 20;
                repairButton.Location = new Point((form.ClientSize.Width - repairButton.Width) / 2, infoLabel.Bottom + vMargin * 2);
                repairButton.FlatStyle = FlatStyle.System;
                UI.EnableShield(repairButton, true);

                form.FormBorderStyle = FormBorderStyle.FixedDialog;
                form.MinimizeBox = false;
                form.MaximizeBox = false;
                form.ShowInTaskbar = true;
                form.Icon = null;
                form.ClientSize = new Size(form.ClientRectangle.Width, repairButton.Bottom + vMargin);

                DialogResult result = form.ShowDialog(null);
                form.Dispose();
                form = null;

                if (result == DialogResult.Yes)
                {
                    return true;
                }
                else if (exception == null)
                {
                    return false;
                }
                else
                {
                    throw new Exception("Error while attempting to repair", exception);
                }
            }

            catch (Exception ex)
            {
                throw new Exception("Could not repair installation after it was determined that the following files are missing: " +
                    missingFilesSB.ToString(), ex);
            }
        }