C# – How to Disable comboBox if other comboBox is selected (C#)

cwinforms

Is there anyway to disable a combobox if a different combobox has some sort of text or value in it. I have tried a couple things and can't seem to get it to work.

Below is Example

ComboBox

Best Answer

Use the SelectedValueChanged event of combobox1 to check for the selected values. Disable or enable combobox2 based upon that.

private void combobox1_SelectedValueChanged(object sender, Eventargs e)
{
    if (combobox1.SelectedValue == myDisableValue)
        combobox2.Enabled = false;
    else
        combobox2.Enabled = true;
 }

Related Solutions

C# – How to sort a dictionary by value

Use LINQ:

Dictionary<string, int> myDict = new Dictionary<string, int>();
myDict.Add("one", 1);
myDict.Add("four", 4);
myDict.Add("two", 2);
myDict.Add("three", 3);

var sortedDict = from entry in myDict orderby entry.Value ascending select entry;

This would also allow for great flexibility in that you can select the top 10, 20 10%, etc. Or if you are using your word frequency index for type-ahead, you could also include StartsWith clause as well.

C# – How to cast int to enum

From an int:

YourEnum foo = (YourEnum)yourInt;

From a string:

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException($"{yourString} is not an underlying value of the YourEnum enumeration.")
}

Update:

From number you can also

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum) , yourInt);

Best Answer

Related Solutions

C# – How to sort a dictionary by value

C# – How to cast int to enum

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