Chapter 11 Advanced Topics in Windows Forms

1
Week 10
Chapter 11. Advanced Topics in
Windows Forms
Chapter 12. Enhancing Usability
Chapter 15: Crystal Report
Chapter 11. Advanced Topics
in Windows Forms

11.1 Drag-Drop (P523)

11.2 MDI (P543)
2
11.1 Drag-Drop (P523)

Windows users fall into two general
categories:

use the keyboard

use the mouse

Drag and drop: same as cutting and pasting
using keyboard
11.1 Drag-Drop (P523)
Sequence of events

Dragging is initiated (call DoDragDrop for the source )

The DoDragDrop method takes two parameters:


data

allowedEffects

A new DataObject object is automatically created.

Raises the GiveFeedback event. (display a custom
mouse pointer during the drag)

Control with AllowDrop =True can receive drop.

DragEnter raised (mouse pass).

GetDataPresent :make sure that the format of the data

Effect property is used to display the appropriate mouse
pointer.

DragDrop: extracts the data from the DataObject
3
11.1 Drag-Drop (P523)
Source control
Target control
+MouseDown
-TXT1.DoDragDrop
(textBox1.Text,
DragDropEffects.Copy )
AllowDrop=true
+DragEnter
if (e.Data.GetDataPresent

(DataFormats.Text))
e.Effect =
DragDropEffects.Copy;
+DragDrop
TXT2.Text =
(string)e.Data.GetData (
DataFormats.Text);
Drag-Drop: demo: Textbox

Using Textbox

Step1: DragEnter event

Step2: DragDrop event

Step3: MouseDown event
4
Drag-Drop: demo: PictureBox

AllowDrop

DragEnter

DragDrop

KeyState
11.1 Drag-Drop (P523) -
demo: treeview

Example: Drag-Drog in Treeview


treeView1_ItemDrag

treeView1_DragEnter

treeView1_DragDrop

treeview1.PointToClient(new Point(e.X, e.Y));

treeview1.GetNodeAt(apoint);

Clone node;

}
5
form
tree
Xform
Yform
Xcontrol
Ycontrol
Point_form(Xform,Yform)
Point_control(Xform,Yform)
C.
PointToClient(Point_form
)
11.1 Drag-Drop (P523) -
demo: Listview

Make new collection


Array

ArrayList

List<generic>
6
11.2 MDI

parent form/child form model.

Has a single parent form

The parent form organizes and
arranges all of the child documents that
are currently open.
11.2 MDI

What is an MDI Form?

Multiple-document interface (MDI)
applications allow you to display multiple
documents at the same time, with each
document displayed in its own window.
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11.2 MDI

How do I create an MDI Parent form ?

Creating an MDI Parent Form


IsMDIContainer=true

How do I create an MDI Child form ?

Creating MDI Child Forms

Set MdiParent to parent form
11.2 MDI

How do I change the Background color of an MDI Parent form?

private void MDIParent1_Load(object sender, EventArgs e)

{

foreach (Control c in this.Controls) {

try

{

MdiClient m = (MdiClient)c;

m.BackColor = Color.Red;

}

catch (Exception ex)


{}

}

}
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11.2 MDI

Identifying the Active Child Form

Form aForm;

aForm = this.ActiveMDIChild;
11.2 MDI

Arranging MDI Child Forms

this.LayoutMdi(System.Windows.Forms.Mdi
Layout.Cascade);
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11.2 MDI

Window List Menu

MenuStrip component

Set the MdiWindowListItem property to the
menu item
11.2 MDI


How do I check if an MDI Child form already exists,
so that we don't show the same form twice?

foreach (Form f in this.MdiChildren)

{

if (f.Text == "Window 2")

{

this.ActivateMdiChild(f);

return;

}

}

Form f1 = new Form();

f1.MdiParent = this;

f1.Show();
10
Chapter 12. Enhancing
Usability

Lesson 2: Using User Assistance
Controls and Components


The ProgressBar Control

StatusStrip Control

ToolTip Component

ErrorProvider Component

HelpProvider Component
Chapter 12. Using User Assistance
Controls and Components

The ProgressBar Control

Visually indicate progress for a time-
consuming operation.

Maximum, Minimum, Value, Step
progressBar1.Minimum = 0;
progressBar1.Maximum = 100;
progressBar1.Step = 1;
for (int i = 0; i < 101; i++)
{
CopyFiles(i);
progressBar1.PerformStep();
}
11
Chapter 12. Using User Assistance
Controls and Components


StatusStrip Control

Display status information about the
application.

ToolStripStatusLabel

Text
Chapter 12. Using User Assistance
Controls and Components

ToolTip Component

To set a tooltip in the Designer

To set a tooltip in code

toolTip1.SetToolTip(button1,

"This button activates the self-destruct
sequence");
12
Chapter 12. Using User Assistance
Controls and Components

ErrorProvider Component

provide feedback to the user when an error
condition results for a control in the form.


Turn on

errorProvider1.SetError(TextBox1, "Value must
be numeric");

Turn off

errorProvider1.SetError(TextBox1, "");
Chapter 15: Report
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Chapter 15: Crystal Report

Crystal Report File

Crystal Report Viewer
Chapter 15: Crystal Report

1. Create Type Dataset

2. Create Crystal Report Template

Menu Project -> Add new item -> Crystal Report

->Using Report Wizard->choose Typed-Dataset-
>…

3. Create CrystalReport Viewer

4. Code to connect objects…


Example
14
Chapter 15: Crystal Report
Typed Dataset
Dataset
Crystal Report.Rpt
Crystal Report Viewer
Class
Chapter 15: Crystal Report

//Create and Fill data into Dataset ds


CrystalReport1 c = new CrystalReport1();

c.SetDataSource(ds);

crystalReportViewer1.ReportSource = c;