Any idea how to add a mouse click event to generated Textbox fields. Here is the code for generating TextBox fields:
private void button1_Click(object sender, EventArgs e)
{
TextBox textbox = new TextBox();
textbox.Location = new Point(60, 25 * count);
textbox.Size = new Size(301, 20);
textbox.Name = "textbox_" + (count + 1);
textbox.TextChanged += new System.EventHandler(this.TextBox_Changed);
panel1.Controls.Add(textbox);
count++;
if (count == 4)
{
MessageBox.Show("");
button1.Enabled = false;
}
}
The code below must be in the method that handles the mouse click event for every generated Textbox field:
TextBox txtName = (TextBox)this.Controls.Find("textbox_1", true)[0];
TextBox txth = (TextBox)this.Controls.Find("textbox_2", true)[0];
if (txtName != null)
{
}
I think you are looking for something like this:
int count = 0;
private void button1_Click(object sender, EventArgs e)
{
TextBox textbox = new TextBox();
textbox.Location = new Point(60, 25 * count);
textbox.Size = new Size(301, 20);
textbox.Name = "textbox_" + (count + 1);
textbox.MouseClick += new System.Windows.Forms.MouseEventHandler(this.TextBox_MouseClick);
textbox.TextChanged += new System.EventHandler(this.TextBox_Changed);
panel1.Controls.Add(textbox);
count++;
if (count == 4)
{
MessageBox.Show("");
button1.Enabled = false;
}
}
private void TextBox_MouseClick(object sender, MouseEventArgs e)
{
TextBox txtName = (TextBox)this.Controls.Find("textbox_1", true)[0];
TextBox txth = (TextBox)this.Controls.Find("textbox_2", true)[0];
if (txtName != null)
{
MessageBox.Show("Test");
}
}
When I preform a click on a TextBox this MessageBox window appears:
I would also change the TextBox_MouseClick method to :
private void TextBox_MouseClick(object sender, MouseEventArgs e)
{
Control[] txtName = this.Controls.Find("textbox_1", true);
Control[] txth = this.Controls.Find("textbox_2", true);
if ((TextBox)txtName[0] != null)
{
MessageBox.Show("Test");
}
}
Because if you create only one TextBox and perform a click on it you will get a System.IndexOutOfRangeException because the second TextBox isn't created so the array that holds you second TextBox is empty.
Related
I have an action for my button in c# Winform like this:
private void btnAction_Click(object sender, EventArgs e)
{
TextBox tbxdg = new TextBox();
tbxdg.Name = "tbx_DG" + cx.ToString();
tbxdg.Location = new Point(508, 12 + (40 * cx));
tbxdg.Size = new Size(200, 24);
tbxdg.Font = new Font("Tahoma", 10);
panel2.Controls.Add(tbxdg);
cx++;
}
Now I want to get text from the textbox that i've created by clicking my button. I've tried call the textbox by the name that i given to it in the button click action but it's not working.
u can try this:
var textBoxText = panel2.Controls.Find("name of textbox", false).First().Text;
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private int cx = 0;
private void button1_Click(object sender, EventArgs e)
{
TextBox tbxdg = new TextBox();
tbxdg.Name = "tbx_DG" + cx.ToString();
tbxdg.Location = new Point(0, 0 + (40 * cx));
tbxdg.Size = new Size(200, 24);
tbxdg.Font = new Font("Tahoma", 10);
panel1.Controls.Add(tbxdg);
cx++;
}
private void button2_Click(object sender, EventArgs e)
{
label1.Text = string.Empty;
foreach (TextBox tb in panel1.Controls)
{
label1.Text += $"{tb.Name} - {tb.Text}\n";
}
}
}
Demo
Instead of searching the control name in the panel, another approach is to add all the dynamic text boxes to global List<TextBox>
Please read comments inside the example:
private int cx;
private List<TextBox> DynamicTextBoxesList = new List<TextBox>();
private void btnAction_Click(object sender, EventArgs e)
{
TextBox tbxdg = new TextBox();
tbxdg.Name = "tbx_DG" + cx.ToString();
tbxdg.Location = new Point(508, 12 + (40 * cx));
tbxdg.Size = new Size(200, 24);
tbxdg.Font = new Font("Tahoma", 10);
panel2.Controls.Add(tbxdg);
// add to list
DynamicTextBoxesList.Add(tbxdg);
cx++;
}
// button event for example how to use DynamicTextBoxesList
private void btnExampleFoaccesingTextBoxes_Click(object sender, EventArgs e)
{
if (DynamicTextBoxesList.Count > 0)
{
foreach (TextBox t in DynamicTextBoxesList)
{
MessageBox.Show(t.Text);
}
// or you can find by name for example you need cx=1:
var txtbox = DynamicTextBoxesList.Where(x => x.Name == "tbx_DG1").FirstOrDefault();
if (txtbox != null)
{
MessageBox.Show(txtbox.Text);
}
}
}
I have a lot of buttons in flow layout panel. I created these buttons programmatically.
But I didn't if click button its color will be light green after second click will be reset color. I wrote this handler for flow layout panel. How can I do second click will clear button color:
private void Form1_Load(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
sb.Append( "3 x coca cola 33 cl");
sb.Append(Environment.NewLine);
sb.Append("DIN");
sb.Append("\t\t");
sb.Append("200");
//button2.Text = sb.ToString();
string products = "30000|3;3110002;Cola;400;150;100;1;1000|3;3110003;Snickers;400;150;100;1;1000|3;3110004;NesttleCrunch;400;150;100;1;1000|3;3110005;Marlbora;400;150;100;1;1000|3;3110006;Orange;400;150;100;1;1000|3;3110007;Milk;400;150;100;1;1000|3;3110008;Water;400;150;100;1;1000|3;3110009;Banana;400;150;100;1;1000|3;3110010;Honey;400;150;100;1;1000|3;3110011;Beer;400;150;100;1;1000|3;3110012;Hazelnut;400;150;100;1;1000|3;3110013;RedBull;400;150;100;1;1000|3;3110014;ChewingGum;400;150;100;1;1000|3;3110015;Apple;400;150;100;1;1000";
string[] listproducts = products.Split('|');
lblAvaliablePoint.Text = listproducts[0];
for (int i = 1; i < listproducts.Count();i++ )
{
string[] perproduct = listproducts[i].Split(';');
Button newButton = new Button();
newButton.Size = new System.Drawing.Size(170, 87);
newButton.BackColor = Color.LightGray;
newButton.UseVisualStyleBackColor = false;
newButton.Tag =perproduct[1];
newButton.Text = perproduct[0] + "x" + perproduct[2];
newButton.Click += new EventHandler(ButtonClickHandler);
flowLayoutPanel1.Controls.Add(newButton);
}
flowLayoutPanel1.VerticalScroll.Maximum = flowLayoutPanel1.Height+40;
flowLayoutPanel1.VerticalScroll.LargeChange = 30;
}
public void ButtonClickHandler(Object sender,EventArgs e)
{
((Button)sender).BackColor = Color.LightGreen;
}
What about add simple if condition into button handler like this?
public void ButtonClickHandler(object sender, EventArgs e)
{
if (((Button)sender).BackColor == Color.LightGreen)
{
((Button)sender).BackColor = Color.White; // Your default color
}
else
{
((Button)sender).BackColor = Color.LightGreen;
}
}
Change your ButtonClickHandler
public void ButtonClickHandler(Object sender, EventArgs e)
{
var currentButton = ((Button)sender);
if(currentButton != null)
{
currentButton.BackColor = currentButton.BackColor == Color.LightGreen ? Color.LightGray : Color.LightGreen;
}
}
I have a window form where I am creating a list of Checkboxes. The number of checkboxes created are based upon how many items are returned from the database. I've been able to create the checkboxes; however, I am not sure how to add event handlers for these checkboxes. For example, I'd like to add an OnCheckedChanged or CheckStateChanged event. How can I add these events? Also, I would appreciate any other suggestion. I am a total newbie to programming.
private void Form1_Load(object sender, EventArgs e)
{
CheckBoxes = new CheckBox[listGroup.Count()];
for (int i = 0; i < listGroup.Count(); i++)
{
CheckBoxes[i] = new CheckBox();
CheckBoxes[i].Text = listGroup.ElementAt(i).GroupName;
CheckBoxes[i].Name = "txt" + listGroup.ElementAt(i).GroupName.Replace(' ', '_');
CheckBoxes[i].CheckedChanged += new EventHandler(CheckBoxes[i]+"_CheckedChanged");
CheckBoxes[i].Width = 200;
if (i == 0)
{
CheckBoxes[i].Location = new System.Drawing.Point(5, 10);
}
else if (i == 1)
{
CheckBoxes[i].Location = new System.Drawing.Point(5, 40);
}
else if (i == 2)
{
CheckBoxes[i].Location = new System.Drawing.Point(5, 80);
}
this.Controls.Add(CheckBoxes[i]);
}
}
private void Form1_Load(object sender, EventArgs e)
{
//...
CheckBoxes[i].CheckedChanged += checkBoxes_CheckedChanged;
CheckBoxes[i].CheckStateChanged += checkBoxes_CheckStateChanged;
}
void checkBoxes_CheckedChanged(object sender, EventArgs e)
{ //do stuff when checked changed }
void checkBoxes_CheckStateChanged(object sender, EventArgs e)
{ //do stuff when check state changed }
Note: this will give identical event handling for all of your checkboxes.
If you want to do different things for different textboxes, you have to name the eventhandler differently and define that eventhandler.
A more efficient way to set the location of your checkboxes
for (int i = 0; i < listGroup.Count(); i++)
{
CheckBoxes[i] = new CheckBox();
CheckBoxes[i].Text = listGroup.ElementAt(i).GroupName;
CheckBoxes[i].Name = "txt" + listGroup.ElementAt(i).GroupName.Replace(' ', '_');
CheckBoxes[i].CheckedChanged += new EventHandler(CheckBoxes[i] + "_CheckedChanged");
CheckBoxes[i].Width = 200;
//set location based on index of i
CheckBoxes[i].Location = new System.Drawing.Point(5, 10 + (i * 30));
this.Controls.Add(CheckBoxes[i]);
}
private void LoadNewCheckboxes()
{
dynamic listGroupCount = 10;
List<System.Windows.Forms.CheckBox> CheckBoxes = new List<System.Windows.Forms.CheckBox>();
for (int i = 0; i <= listGroupCount - 1; i++)
{
System.Windows.Forms.CheckBox chkbox = new System.Windows.Forms.CheckBox();
chkbox.Text = i.ToString();
//listGroup.ElementAt(i).GroupName
chkbox.Name = "txt" + i.ToString();
//listGroup.ElementAt(i).GroupName.Replace(" "c, "_"c)
chkbox.CheckedChanged += new EventHandler(chkbox_CheckedChanged);
chkbox.CheckStateChanged += new EventHandler(chkbox_CheckStateChanged);
chkbox.Width = 200;
chkbox.AutoSize = true;
this.Controls.Add(chkbox);
CheckBoxes.Add(chkbox);
if (i == 0)
{
chkbox.Location = new System.Drawing.Point(5, 10);
}
else
{
chkbox.Location = new System.Drawing.Point(5, (CheckBoxes[i - 1].Top + CheckBoxes[i - 1].Height + 10));
}
}
}
private void chkbox_CheckedChanged(object sender, EventArgs e)
{
System.Windows.Forms.CheckBox chkbox = (System.Windows.Forms.CheckBox)sender;
if (chkbox != null)
{
//do somthing
Debug.WriteLine("chkbox_CheckedChanged");
Debug.WriteLine(chkbox.Text);
Debug.WriteLine(chkbox.Checked.ToString());
Debug.WriteLine(chkbox.Name.ToString());
}
}
private void chkbox_CheckStateChanged(object sender, EventArgs e)
{
System.Windows.Forms.CheckBox chkbox = (System.Windows.Forms.CheckBox)sender;
if (chkbox != null)
{
//do somthing
Debug.WriteLine("chkbox_CheckStateChanged");
Debug.WriteLine(chkbox.Text);
Debug.WriteLine(chkbox.Checked.ToString());
Debug.WriteLine(chkbox.Name.ToString());
}
}
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)
i'm designing a windows form application. In this app, user selects a number from a combobox, then depending on the number, some dynamic controls will be created(labels and comboboxes).
My problem is, i need to write some code on these dynamically created comboboxs' "selectedindexchanged" event. But i don't know how to create an event to dynamic combobox.
Here is my function:
FORM1.CS
public void getchildCntrl(Panel pnl,ComboBox cmbb)
{
for (int ix = pnl.Controls.Count - 1; ix >= 0; ix--)
if (pnl.Controls[ix].Name.Substring(0, 5) == "Child") pnl.Controls[ix].Dispose();
if (cmbb.SelectedIndex != 0)
{
Label[] childLabels = new Label[cmbb.SelectedIndex];
ComboBox[] txtTeamNames = new ComboBox[cmbb.SelectedIndex];
for (int i = 0; i < txtTeamNames.Length; i++)
{
//label create
var lbl = new Label();
childLabels[i] = lbl;
lbl.Name = "ChildLb" + i.ToString();
lbl.Text = (i + 1).ToString() + ". Çocuk-Yaş :";
lbl.Width = 80;
lbl.Location = new Point(cmbb.Location.X - 85, cmbb.Location.Y + 7 + ((i + 1) * 28));
lbl.Visible = true;
pnl.Controls.Add(lbl);
//combobox create
var cmb = new ComboBox();
txtTeamNames[i] = cmb;
cmb.Name = "Child" + i.ToString();
cmb.Location = new Point(cmbb.Location.X, cmbb.Location.Y + 5 + ((i + 1) * 28));
cmb.Width = 40;
cmb.DropDownStyle = ComboBoxStyle.DropDownList;
cmb.DataSource = ages.ToArray();
cmb.Visible = true;
pnl.Controls.Add(cmb);
}
}
}
You just register to the event like below...
cmb.SelectedIndexChanged += new System.EventHandler((object o, EventArgs e) =>
{
//Do something here
});
Or
cmb.SelectedIndexChanged += new System.EventHandler(cmb_SelectedValueChanged);
private void cmb_SelectedValueChanged(object sender, EventArgs e)
{
//Do something here.
}
You can hook up an event handler to the ComboBox like this:
cmd.SelectionChanged += new SelectionChangedEventHandler(GuiController_SelectionChanged);
void GuiController_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
throw new NotImplementedException();
}
Register event handler this way:
cmb.SelectedIndexChanged+=new EventHandler(cmb_SelectedIndexChanged);
Unregister this way:
cmb.SelectedIndexChanged-=new EventHandler(cmb_SelectedIndexChanged);
private void cmb_SelectedIndexChanged(object sender, System.EventArgs e)
{
//write your event code here
}
How to: Create Event Handlers at Run Time for Windows Forms
public void getchildCntrl(Panel pnl,ComboBox cmbb)
{
//// your code.....
//combobox create
var cmb = new ComboBox();
cmb.SelectedIndexChanged+=new EventHandler(cmb_SelectedIndexChanged);
// remaining code
cmb.Visible = true;
pnl.Controls.Add(cmb);
}
}
}
For specifying parameters - go through:
ComboBox.SelectedIndexChanged Event