I read MSDN for WinUI but haven't found any information about how to disable checkbox. If it's exists, what's the name of property?
If it doesn't, how should I control, that checkbox cannot be changed? By overriding onClick?
Yes. Disabled doesn't exists, but all controls have Enabled property, and you can set it to False. This will disable your CheckBox, as you want.
You're probably looking for the IsEnabled property, available to all Controls.
Related
So I have a UserControl Form. Where I have a MenuStrip
So I want to add a ToolTip on my MenuStripItems ( which are only pictures ). But setting the text on ToolTipText did not help at all. Also tried
adaugaToolStripMenuItem.ToolTipText = "Click for the current time";
adaugaToolStripMenuItem.AutoToolTip = false;
So I have no idea, any help? Is there a way I can add a ToolTip or some kind of hint to my MenuStripItems ?
Did you make sure ShowItemToolTips of the MenuStrip container is also set to true? It's false by default. You may want to use its other property DefaultShowItemToolTips instead.
MSDN Link.
Also check the item's AutoToolTip property is set to false. Its default value is true, and that means it uses the Text property as tooltip.
MSDN Link.
I am working in C# 4.5 - Winform. My question is specific to C# WinForm.
I want to bind a Control's property to another control's property value on the same form.
I have a GroupBox and a Check Box. When Check box is checked then group box should be enabled and when CheckBox in un-checked then GroupBox should be disabled.
However this task can be fulfilled by implement checkbox "CheckedChanged" event. But i want to accomplish this without writing any code.
I dont know it is possible or not. If possible then please provide solution.
It is possible to do via the designer. For your control -> Properties -> Binding...
But it is a lot of steps to result in a line of code in the designer file which you can add yourself just as easily in the constructor:
this.groupBox.DataBindings.Add( "Enabled", this.myCheckBox, "Checked" );
I want to use a text box to display some text. I can not disable it, because then the scroll bar will not work.
How can I prevent editing within the multi-line textbox, yet make it appear as if it is enabled, so that the scroll bar works correctly?
You can set the ReadOnly property to true.
Quoth the link:
When this property is set to true, the contents of the control cannot
be changed by the user at runtime. With this property set to true, you
can still set the value of the Text property in code. You can use this
feature instead of disabling the control with the Enabled property to
allow the contents to be copied and ToolTips to be shown.
The TextBox has a property called ReadOnly. If you set that property to true then the TextBox will still be able to scroll but the user wont be able to change the value.
As mentioned above, you can change the property of the textbox "Read Only" to "True" from the properties window.
textBox1.ReadOnly = true;
"true" property will make the text box readonly activate. and "false" will make it in regular form. Thanks.
I am using MVVM for my WPF application. I have a AutoCompleteBox in my xaml file which works normally. But now, I added a bool flag in my ViewModel isHideDropDown which will hide dropdown for the AutoCompleteBox if set to true. To summarise, I want my AutoCompleteBox to work as normal TextBox if isHideDropDown is set to true.
Can anyone give me some idea?
Thanks
Assuming you're using the AutoCompleteBox described here.
Setting the MinimumPrefixLength to -1 will disable the auto complete functionality of the control.
So, if you add an int MinimumPrefixLength property to your ViewModel that returns -1 when isHideDropDown is true, then you can bind to that. The other option would be to write a value converter that converts the boolean isHideDropDown value to the appropriate integer.
I have't tried this. But, instead of setting isHideDropDown to true, why not set the object that binds to ItemSource property as null?
In an autocompleteBox you need to set the ItemSource. When you don't want the autocomplete feature just set that object to null
You can also try to override ItemContainerStyle:
http://msdn.microsoft.com/en-us/library/dd795156%28v=vs.95%29.aspx#customizing_the_appearance_of_the_autocompletebox
Use DataTrigger with Binding to conditionally set ItemContainer's Visibility to Visible/Collapsed
Why is the IsChecked property of a checkbox control in WPF of type bool? (or Nullable<bool>). I mean how can a checkbox control have the value of null?
Yes the null value exists and appears as a filled box. It indicates "Not Applicable" to the system.
According to the documentation, the IsChecked property has three different possible states:
So, when IsChecked is set to null, the check box will show an "indeterminate" state. This is commonly represented as a shaded, or greyed-out, control.
Checkboxes can have a 3rd, grayed, indeterminate state.
Don't forget to set the checkbox's property IsThreeState to true to enable this functionality.
Because WPF supports binding. If we bind a DB boolean column value to a checkbox. That column may have True/False/Null values. That means it has three values for a boolean field. So the WPF UI also should handle the three state.