I have a small program that hold 4 button in a 2D Array what I want to do is display its 'X' and 'Y' coordinates of the Array in a message box (when clicked)
I have tried a number of ways some don't work and some work but I cant get it to show the 'X' and 'Y' values
The image below shows what I have so far:
And This is the code i have come up with:
namespace _2DArray
{
public partial class Form1 : Form
{
private Button[,] b;
public Form1()
{
InitializeComponent();
b = new Button[2, 2];
b = new Button[,] { {button1,button2 },
{button3, button4}};
}
private void Form1_Load(object sender, EventArgs e)
{
foreach (Button bt in b)
{
bt.Click += new System.EventHandler(this.ClickedButton);
}
}
private void ClickedButton(object sender, EventArgs e)
{
Button s = (Button)sender;
MessageBox.Show("you have clicked button:" + s);
}
}
}
Here is the answer to your question if i read it right. You are trying to get the X and Y coordinates of the button right?
Here is the code for a button click:
private void button2_Click(object sender, EventArgs e)
{
MessageBox.Show(button1.Location.ToString());
}
try assigning some sort of pointer like give name of the button to keep track of it coordinates
private void Form1_Load(object sender, EventArgs e)
{
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
b[i, j].Click += new System.EventHandler(this.ClickedButton);
b[i, j].Name =i+" "+j;
}
}
}
private void ClickedButton(object sender, EventArgs e)
{
Button s = (Button)sender;
MessageBox.Show("you have clicked button:" + s.Name);
}
Use this code
private void Form1_Load(object sender, EventArgs e) {
for (int x = 0; x < 2; x++) {
for (int y = 0; x < 2; y++) {
b[x, y].Tag = new Point(x, y);
b[x, y].Click += new System.EventHandler(this.ClickedButton);
}
}
}
private void ClickedButton(object sender, EventArgs e) {
Button s = (Button) sender;
MessageBox.Show("you have clicked button:" + s.Tag.ToString());
}
then clicking on button1 will show the message "you have clicked button:{X = 0, Y = 0}" etc
Tag is a property that each control has, it's description is "User-defined data associated with the object" so you can set it to whatever object you like.
I know this is probably a bit late for the op but hopefully it will help someone else.
Related
I have plotted a graph in c#. How can I move the graph vertically up and down when a button is pressed.
private void button1_Click(object sender, EventArgs e)
{
chart1.Series[0].Points.Clear();
if (button1.Enabled == true)
{
for (int i = 0; i < 20; i++)
chart1.Series[0].Points.AddXY(i, Y1scale(i) + 1);
}
}
this is the code I have coded. But only on the first click it works. Further I want to move the graph continuously like in an oscilloscope without jumping from 1 y unit to another
I use a counter and each mouse click is counted and y values are shifted adding count value to the existing y value.
public Form1()
{
InitializeComponent();
}
double ch1_count_up=0;
double ch1_count_down = 0;
private void button1_Click(object sender, EventArgs e)
{
if(radioButton1.Checked==true)
{
ch1_count_up++;
chart1.Series[0].Points.Clear();
for (int i = -20; i < 20; i++)
chart1.Series[0].Points.AddXY(i, Y1scale(i) + (ch1_count_up / 10) - (ch1_count_down / 10));
}
Let's say I have a ListView on a form and it is populated with records.
How can I do this : when I click (single click) on a row , something has to happen - for example MessageBox.Show("row selected");
How to make this happen? Do I need a mouse click event ? And how can I do this?
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
var selectedItemText = (listBox1.SelectedItem ?? "(none)").ToString();
MessageBox.Show("Selected: " + selectedItemText);
}
private void listBox1_MouseClick(object sender, MouseEventArgs e)
{
for (int i = 0; i < listBox1.Items.Count; i++)
{
var rectangle = listBox1.GetItemRectangle(i);
if (rectangle.Contains(e.Location))
{
MessageBox.Show("Item " + i);
return;
}
}
MessageBox.Show("None");
}
#Tommy answer is for ListBox, this one is for ListView :
private void listView1_MouseClick(object sender, MouseEventArgs e)
{
for (int i = 0; i < listView1.Items.Count; i++)
{
var rectangle = listView1.GetItemRect(i);
if (rectangle.Contains(e.Location))
{
//Write your code here
return;
}
}
}
To prevent unwished behavior on ListView with checkboxes my solution is:
private void lvMembers_MouseClick(object sender, MouseEventArgs e)
{
for (int itemIndex = 0; itemIndex < lvMembers.Items.Count; itemIndex++)
{
ListViewItem item = lvMembers.Items[itemIndex];
Rectangle itemRect = item.GetBounds(ItemBoundsPortion.Label);
if (itemRect.Contains(e.Location))
{
item.Checked = !item.Checked;
break;
}
}
}
If you want to select listview item on mouse click over it try this.
private void timeTable_listView_MouseUp(object sender, MouseEventArgs e)
{
Point mousePos = timeTable_listView.PointToClient(Control.MousePosition);
ListViewHitTestInfo hitTest = timeTable_listView.HitTest(mousePos);
try
{
int columnIndex = hitTest.Item.SubItems.IndexOf(hitTest.SubItem);
edit_textBox.Text = timeTable_listView.SelectedItems[0].SubItems[columnIndex].Text;
}
catch(Exception)
{
}
}
I created 5 PictureBox "Shapes" and I want them to move to the left automatically when the program is launched. So in the timer1_Tick method, I use "Shapes[i].Left -= 2", it's said that "Shapes" isn't in the actual context, so How can I make the Shapes[i] global from the "CreatePipes" method?
public partial class Form1 : Form
{
int i = 0;
int N = 5;
int yspeed;
int gravity = 2;
public Form1()
{
InitializeComponent();
this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.Form1_KeyDown);
}
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Space)
{
yspeed = -15;
}
}
private void Form1_Load(object sender, EventArgs e)
{
CreatePipes(1);
}
public void CreatePipes(object Number)
{
PictureBox[] Shapes = new PictureBox[N];
for (i = 0; i < N; i++)
{
Shapes[i] = new PictureBox();
Shapes[i].Name = "ItemNum_" + i.ToString();
Shapes[i].Location = new Point(300 + 120 * i, 250);
Shapes[i].Size = new Size(30, 1000 );
Shapes[i].BackColor = Color.Green;
Shapes[i].Visible = true;
this.Controls.Add(Shapes[i]);
}
}
private void bird_Click(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
for (i = 0; i < N; i++)
{
Shapes[i].Left -= 2; //So the problem is here. Shapes[i] isn't in the actual context. But I don't know to to make it global from CreatePipes
}
yspeed += gravity;
bird.Top += yspeed;
}
}
}
You have to declare PictureBox[] Shapes above CreatePipes function, in Form1 class. Then in CreatePipes func, change PictureBox[] Shapes = new PictureBox[N]; to Shapes = new PictureBox[N];
I have tried creating textboxes dynamically using lists. All i need now is, how can i reset all text boxes that i have created by hitting a reset button.
The following is my code:
public void button2_Click_1(object sender, EventArgs e)
{
int number = Convert.ToInt32(textBox2.Text);
List<TextBox> inputTextBoxes;
inputTextBoxes = new List<TextBox>();
for (int i = 1; i <= number; i++)
{
Label labelInput = new Label();
TextBox textBoxNewInput = new TextBox();
labelInput.Text = "Activity No: " + i;
labelInput.Location = new System.Drawing.Point(30, textBox2.Bottom + (i * 40));
labelInput.AutoSize = true;
textBoxNewInput.Location = new System.Drawing.Point(labelInput.Width+60, labelInput.Top - 3);
inputTextBoxes.Add(textBoxNewInput);
this.Controls.Add(labelInput);
this.Controls.Add(textBoxNewInput);
}
}
The answer is:
private void resetButton_Click(object sender,EventArgs e)
{
for (int i = 0; i <= inputTextBoxes.Length; i++)
{
inputTextBoxes[i].Text = "";
}
}
And you should declare inputTextBoxes is a class member which is same class' of buttons.
Move the following line outside the event handler function (outside the function but inside the class)
List<TextBox> inputTextBoxes;
Then on the reset button click
private void btnReset_Click(object sender, EventArgs e)
{
foreach(TextBox txt in inputTextBoxes)
{
this.Controls.Remove(txt);
}
inputTextBoxes.Clear();
}
Edit: Corrected the class type in foreach loop (from Button to TextBox)
Im trying to create a array of Checkboxes in Winforms and I have four Checkboxes and if I click on a Checkbox, a messagebox should display the checkboxes checked.
public void checkboxtest()
{
CheckBox[] boxes = new CheckBox[4];
boxes[0] = checkBox1;
boxes[1] = checkBox2;
boxes[2] = checkBox3;
boxes[3] = checkBox4;
for (int i = 0; i <= 4; i++)
{
if (boxes[i].Checked == true && boxes[i].Enabled)
{
MessageBox.Show("boxes[i] is clicked");
}
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
checkboxtest();
}
private void checkBox2_CheckedChanged(object sender, EventArgs e)
{
checkboxtest();
}
continues for 3 and 4 too...
How should I go about it ??
Thanks.
Your loop termination should be i < 4, not i <= 4 since your array only has 4 elements. Also boxes[i].Checked == true is redundant, you can just say boxes[i].Checked.
If you want to display the checked checkboxes when you toggle the state, you'll need to add an event handler to them (to handle the CheckBox.CheckChanged event):
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
_checkBoxes = new CheckBox[] { _checkBox1, _checkBox2, _checkBox3, _checkBox4 };
foreach (var checkBox in _checkBoxes)
checkBox.CheckedChanged += new EventHandler(ShowCheckedCheckboxes);
}
void ShowCheckedCheckboxes(object sender, EventArgs e)
{
string message = string.Empty;
for (int i = 0; i < _checkBoxes.Length; i++)
{
if (_checkBoxes[i].Checked && _checkBoxes[i].Enabled)
{
message += string.Format("boxes[{0}] is clicked\n", i);
}
}
MessageBox.Show(message);
}
CheckBox[] _checkBoxes;
}