I am trying to prevent the change status of textbox and radio button when the button (btactive) is clicked. I can use property IsReadOnly for textbox but I can not find this property in radio button, Is there anyway to prevent the change status of radiobutton ?
Here is my code :
private void btActive_Click(object sender, RoutedEventArgs e)
{
if (check != 0)
{
udhour.IsReadOnly = true;
udmin.IsReadOnly = true;
testvalue.IsReadOnly = true;
//How can I set Isreadonly for radio button
}
}
Disable radio button. use IsEnabled=false
Change the AutoCheck property of the RadioButton to False
Add radiobutton.IsEnabled = false in the code.
Write and Checked changed event for the readonly effect.
void radioButton1_CheckedChanged(object sender, EventArgs e)
{
radioButton1.Checked = !radioButton1.Checked;
}
Related
I want to show a ToolTip when the value of a cell in a DataGridView control is changed and the introduced value is invalid.
This can easily be done with the code below, but the problem is that after the ToolTip is shown, it is also associated with the control, so every time the DataGridView is hovered the ToolTip is displayed, and I want it to be shown only once after the data has been changed.
I have noticed that this happens only with DataGridView and GroupBox. With a TextBox or a Button the ToolTip is not associated with the control when shown over it.
Why does this happen?
public partial class Form1 : Form
{
this.dataGridView1.ShowCellToolTips = false; // so we can show regular tooltip
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
DataGridView control = (DataGridView)sender;
// check if control.Rows[e.RowIndex].Cells[e.ColumnIndex].Value is valid
if (invalid)
{
toolTip.Show("Invalid data", dataGridView1, 5000);
}
}
There are many ways to deal with this. The simplest and most direct seems to be to Hide the ToolTip when you are leaving the DataGridView:
private void dataGridView1_Leave(object sender, EventArgs e)
{
toolTip1.Hide(this);
}
Of course it is up to you to decide upon the full design of what should happen while the error is still there..!
As for Textboxes: They are very special and there is usually no use in asking why they behave diffently..
Another way would be to code the Popup event and use the Tag as a flag to make sure it is shown only once:
Before you show it in the CellValueChanged you set a flag:
toolTip1.Tag = "true";
and in the Popup event you check for it:
private void toolTip1_Popup(object sender, PopupEventArgs e)
{
if (toolTip1.Tag == null) return;
bool show = toolTip1.Tag.ToString() == "true";
if (toolTip1.Tag != "true") e.Cancel = true;
toolTip1.Tag = "false";
}
My question is, what code do I have to write so that my radiobutton1 will show me the checkboxlist1 which is not visible -> Visible set on False.
I want to show the checkboxlist only if radiobutton1 is checked.
I am using visual c#2012. Hope you can help.
You use Checked property of the RadioButton to identify wether RadioButton is checked or not.
From MSDN : RadioButton.Checked
Gets or sets a value indicating whether the control is checked.
Try This:
if(radioButton1.Checked)
{
//Enable checkboxlist
CheckBoxList1.Visible=true;
}
EDIT :
You should handle it in CheckedChanged EVent handler of the RadioButton
Try This:
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if(radioButton1.Checked)
{
//Enable checkboxlist
CheckBoxList1.Visible=true;
}
}
EDIT:
if you want to disable another radiobutton try this:
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if(radioButton1.Checked)
{
//Enable checkboxlist
CheckBoxList1.Visible=true;
//Disable RadioButton
RadioButton2.Visible=false;
}
}
you can do
CheckBoxList1.Visible = radioButton1.Checked
I am working on C# application. I have 10 radio buttons in a group panel, so now if I only checked the radioButton10 then textBox1 will be visible, if I checked someone of the other radio Buttons (radioButton1 .... radioButton9) then textBox1 should be invisible.
I wrote the following code but the textBox1 is still visible. If the code is right where can I wrote it(form load, some function ... etc) if it's NOT, then Please Help.
public TeamInfoForm()
{
InitializeComponent();
showTeam();
if (radioButton10 .Checked)
textBox1 .Visible = true;
else
textBox1 .Visible = false;
}
I think you forgot to implement the event that occur when you check or uncheck the radiobutton. Try to imlpement "OnCheckChanged" event for the radiobutton and you have to set autopostback to true if you want that the event occurs, otherwise the event won't work.
Initially you have to set the Visible property of textBox1 to false in Forms Designer. Otherwise you can set it in FormInitialize() method. Next you have write code like below
public void ToggleTextBox()
{
textBox1.Visible = radioButton3.Checked;
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
ToggleTextBox();
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
ToggleTextBox();
}
private void radioButton3_CheckedChanged(object sender, EventArgs e)
{
ToggleTextBox();
}
Please read my question its not a duplicate one.
I've three radio buttons on windows form and all these buttons have common 'CheckedChanged' event associated. When I click any of these radio buttons, it triggers the 'CheckedChanged' event twice.
Here is my code:
private void radioButtons_CheckedChanged(object sender, EventArgs e)
{
//My Code
}
I inserted the breakpoint and the whole code within this event iterates twice.
Please tell me why it is behaving like this?
As the other answerers rightly say, the event is fired twice because whenever one RadioButton within a group is checked another will be unchecked - therefore the checked changed event will fire twice.
To only do any work within this event for the RadioButton which has just been selected you can look at the sender object, doing something like this:
void radioButtons_CheckedChanged(object sender, EventArgs e)
{
RadioButton rb = sender as RadioButton;
if (rb != null)
{
if (rb.Checked)
{
// Only one radio button will be checked
Console.WriteLine("Changed: " + rb.Name);
}
}
}
To avoid it, just check if radioButton is checked
for example:
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (radioButton1.Checked)
//your code
}
CheckedChanged is raised whenever the Checked property changes. If you select a RadioButton then the previously selected RadioButton is unchecked (fired CheckedChanged), and then the new RadioButton is checked (fired CheckedChanged).
It's triggering once for the radio button transition from checked to unchecked, and again for the radio button transitioning from unchecked to checked (i.e. any change in checked state triggers the event)
You could set the AutoCheck property true for each RadioButton then catch the Click event instead of the CheckChanged event. This would ensure that only one event is fired, and the logic in the handler can cast the sender to type RadioButton if needed to process the click. Often the cast can be avoided if the handler logic is simple. Here is an example which handles three controls, rbTextNumeric, rbTextFixed and rbTextFromFile:
private void rbText_Click(object sender, EventArgs e)
{
flowLayoutPanelTextNumeric.Enabled = rbTextNumeric.Checked;
txtBoxTextFixed.Enabled = rbTextFixed.Checked;
flowLayoutPanelTextFromFile.Enabled = rbTextFromFile.Checked;
}
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}
int click = 0;
private void radioButton1_Click(object sender, EventArgs e)
{
click++;
if (click %2==1)
{
radioButton1.Checked = true;
}
if (click %2==0)
{
radioButton1.Checked = false;
}
if (radioButton1.Checked==true)
{
label1.Text = "Cheked";
}
if (radioButton1.Checked==false)
{
label1.Text = "Uncheked";
}
}
}
}
The other answers are correct but miss the reason for the underlying problem.
When a radio button is checked the first event sent is the change from the unchecked item
however if you check its state by its control name you will still see its old checked status because the form has not been updated yet. To see its true status you need to cast the sender object.
This allows you to perform any actions relating to the condition which is being deselected should you need to do so.
In the not uncommon scenario below multiple radio buttons are sent to the same handler event.
Simply checking the state of the sender for checked will not work here as we need to perform different actions depending on which radio button has been pressed.
So first we ignore any sender that has just been unchecked.
then we identify the checked sender by control name to process the correct action.
private void ModeChangedExample(object sender, EventArgs e)
{
// multiple radio buttons come here
// We only want to process the checked item.
// if you need to something based on the item which was just unchecked don't use this technique.
// The state of the sender has not been updated yet in the form.
// so checking against rdo_A check state will still show it as checked even if it has just been unchecked
// only the sender variable is up to date at this point.
// To prevent processing the item which has just been uncheked
RadioButton RD = sender as RadioButton;
if (RD.Checked == false) return;
if (rdo_A.Name == RD.Name)
{
//Do stuff
}
if (rdo_B..Name == RD.Name)
{
// Do other stuff
}
if (rdo_C.Name == RD.Name)
{
// Do something else
}
}
This problem of double checking happens when there is a series of RadioButton Clicks in succession.I had this same problem.The last click will give two results.To overcome this i made a dummy click in the end.The double click stopped.Try this method.
Venkatraman
I have a number of checkboxes that I want to handle them as toggle buttons. Each one is totally independent from the other and can be either checked or unchecked. When the user clicks on the checkbox/button it stays checked and if the user clicks again, then the checkbox/button returns to the "unchecked" state. Can the checkbox/button check/uncheck itself?
I have been trying for a long time, searching also in the internet and cannot find a solution.
Check the status of the check box, every time the button is clicked, change it.
private void toggButton_CheckedChanged(object sender, EventArgs e)
{
// everytime you click the button checkbox states will change.
if(checkBox.Checked)
{
checkBox.Checked = false;
}
else
{
checkBox.Checked = true;
}
}
The problem is that the checkbox/button is "displayed" as always
pressed i.e. the "blue" color that it has when checked is not changed
giving the impression that it is not unchecked. – user1304490
May be setting CheckBox.ThreeState property false helps.
If the ThreeState property is set to false, the CheckState property value can only be set to the Indeterminate value of System.Windows.Forms.CheckState in code and not by user interaction.
A very short command:
checkBox.Checked = !checkBox.Checked;
You can assign a common event to all Checkboxes. Write this code in your .cs file and select all Checkboxes and assign this event to checkedChange event.
private void chkboxes_CheckedChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
if(!chk.Checked)
chk.Checked = true;
else
chk.Checked = false;
}
Ref: CheckBox.CheckState property.
it is read and write property so you set it in GUI or through code.
Checked The CheckBox displays a check mark. The control appears sunken.
Unchecked The CheckBox is empty. The control appears raised.
Indeterminate The CheckBox displays a check mark and is shaded. The control appears flat.
write this on checked change event and check it is toggle or not.. it will work as like a switch..
label1.Text = "ThreeState: " + checkBox1.ThreeState.ToString() + "\n" + "Checked: " +
checkBox1.Checked.ToString() + "\n" + "CheckState: " + checkBox1.CheckState.ToString();
for your question's answer check CheckBox.AutoCheck Property
When you want to change check box state for too many check boxes on one form, you need fast reliable code, without complexity.
The best way for doing it is using:
CheckBox.CheckState
you can change Check Boxes state to (unchecked) for example using this code:
checkbox1.CheckState = CheckState.Unchecked;
checkbox2.CheckState = CheckState.Unchecked;
checkbox3.CheckState = CheckState.Unchecked;
For further reading, see this from MSDN.
The question is very unclear but if someone is still struggling with checkboxes:
Toggle between two of them(both checkboxes cannot be ticked at the same time and min. one need to be ticked):
private void chkBoxON_CheckedChanged(object sender, EventArgs e)
{
if (chkBoxON.Checked)
{
chkBoxOFF.Checked = false;
// here some code to do after this checkbox is ticked
}
else
{
chkBoxOFF.Checked = true;
}
}
private void chkBoxOFF_CheckedChanged(object sender, EventArgs e)
{
if (chkBoxOFF.Checked)
{
chkBoxON.Checked = false;
// here some code to do after this checkbox is ticked
}
else
{
chkBoxON.Checked = true;
}
}
If you need only one checked or both unchecked then:
if (chkBoxON.Checked)
{
chkBoxOFF.Checked = false;
}
}
private void chkBoxOFF_CheckedChanged(object sender, EventArgs e)
{
if (chkBoxOFF.Checked)
{
chkBoxON.Checked = false;
}
If you need to change the state of it using the button then:
private void button1_Click(object sender, EventArgs e)
{
chkBoxON.Checked = false;
//chkBoxON.Checked = true; //if need to be checked
}
If you need to disable the possibility to click checkBox then:
chkBoxOFF.Enabled = false;
You just need to use the NOT operator to create the simplest toggle.
checkBox.Checked = !checkBox.Checked;