C#在选择文本时启用按钮 [英] c# enable a button when text is selected

问题描述

我想做的是当我在richtextbox中输入文本时禁用2按钮，但是当我突出显示txt时，按钮启用.

到目前为止，这里是我的代码

if (txtDisplay.Modified == true)
            {
                cutText.Enabled = false;
                copyText.Enabled = false;
            }

希望有人可以提供帮助

解决方案

假设突出显示"是指您已选择文本:

 私有 布尔 IsSelection =  false ;

私有 无效 richTextBox1_SelectionChanged(对象发​​件人，EventArgs e)
{
    IsSelection = richTextBox1.SelectionLength！=  0 ;

    button1.Enabled = IsSelection;
    button2.Enabled = IsSelection;
} 

突出显示的意思是用户突出显示文本.

有问题

what i want to do is disable 2 button when i enter text in the richtextbox but when i highlight the txt the button enable.

here my code so far

if (txtDisplay.Modified == true)
            {
                cutText.Enabled = false;
                copyText.Enabled = false;
            }

hope someone can help

解决方案

Assuming by "highlight" you mean you have selected text:

private bool IsSelection = false;

private void richTextBox1_SelectionChanged(object sender, EventArgs e)
{
    IsSelection = richTextBox1.SelectionLength != 0;

    button1.Enabled = IsSelection;
    button2.Enabled = IsSelection;
}

what i mean by highlight is the user highlights the text.

anyone this bit is really annoying me as only part i got a problem with

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