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将禁用组合的背景颜色设置为白色

发布于 2024-11-09 12:39:25 字数 66 浏览 0 评论 0原文

你好我有一个可以在运行时启用和禁用的组合框。现在我需要使背景颜色保持不变，即使它被启用或禁用。任何人都可以帮助我吗？

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紫竹語嫣☆ 2024-11-16 12:39:25

我找到了以下解决方案。

解决方案 1：

在禁用时将下拉样式设置为 "DropDownList"，然后在启用控件时将其重置为 "DropDown"

combobox.DropDownStyle = ComboBoxStyle.DropDownList;

解决方案 2：

转到此处 http://www.codeproject.com/Articles/ 22454/ReadOnly-ComboBox

第一个解决方案对我有用，第二个解决方案你可以尝试一下。

I found following solutions.

Solution 1:

set the dropdownstyle to be "DropDownList" when disabled and then reset it to "DropDown" when you enabled the control

combobox.DropDownStyle = ComboBoxStyle.DropDownList;

Solution 2:

Go here http://www.codeproject.com/Articles/22454/ReadOnly-ComboBox

First solution work for me and 2nd solution u can try it.

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淡忘如思 2024-11-16 12:39:25

这对我有用

comboBox1.DropDownHeight = 1;
comboBox1.KeyDown += new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress += new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp += new KeyEventHandler(comboBox1_KeyUp);

现在在每个处理程序中只需设置 e.Handled = true

void comboBox1_KeyUp(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyDown(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

现在，当您必须将其用作启用时，只需删除处理程序并设置 DropDownHeight

comboBox1.KeyDown -= new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress -= new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp -= new KeyEventHandler(comboBox1_KeyUp);

This worked for me

comboBox1.DropDownHeight = 1;
comboBox1.KeyDown += new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress += new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp += new KeyEventHandler(comboBox1_KeyUp);

Now in each of this handlers just set e.Handled = true

void comboBox1_KeyUp(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyDown(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

Now when you have to function it as a Enabled just remove the handlers and set the DropDownHeight

comboBox1.KeyDown -= new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress -= new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp -= new KeyEventHandler(comboBox1_KeyUp);

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旧情勿念 2024-11-16 12:39:25

如果这是 WinForms，则将 BackColor 属性设置为您想要的任何值。

如下所述，这不起作用。

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感受沵的脚步 2024-11-16 12:39:25

根据您的具体需求，谷歌搜索为我找到了一个潜在的解决方案：

如果您想要使组合框处于禁用状态（不可更改，但看起来与启用时相同），则快速将 Enabled 属性从 true 设置为 false，然后再次按回车键即可实现它，尽管方式有点hacky：

bool isDisabled = true;
private void comboBox1_Enter(object sender, EventArgs e)
{
    if(isDisabled)
    {
        comboBox1.Enabled = false;
        comboBox1.Enabled = true;
    }
}

Depending on exactly what you are after, Googling has found me a potential solution:

If what you're after is to get the combobox in a disabled state (unchangable, but looking the same as when enabled), then quickly setting the Enabled property from true, to false, then back again on Enter achieves it, although in a somewhat hacky manner:

bool isDisabled = true;
private void comboBox1_Enter(object sender, EventArgs e)
{
    if(isDisabled)
    {
        comboBox1.Enabled = false;
        comboBox1.Enabled = true;
    }
}

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