如何禁用组合框? [英] How to disable combo box?

问题描述

我的.net Windows应用程序中有三个组合框.在第一个组合框中，有两个选项，例如India和Foreign.如果我在第一个组合框中选择印度"，则必须禁用第三个组合框.如果我在第一个组合框中选择外国"，则第二个组合框中将不得不禁用.这是我的问题.请将编码发送给我.

Hi,

I have three combo box in my .net windows application.In 1st combo box i have two option like India and Foreign. If i select india in 1st combo box,the third combo box will have to disabled. if i choose foreign in 1st combo box ,the 2nd combo box will have to disabled. This is my question.Kindly send me the coding.

protected void combobox1_SelectedIndexChanged(object sender, EventArgs e)
{
if(combobox1.SelectVelue == "indian")
{
combobox3.Enable = false;
combobox2.Enable = true;
}
else if (combobox1.SelectVelue == "Foreign")
{
combobox3.Enable = true;
combobox2.Enable = False;
}
Else
{
combobox3.Enable = true;
combobox2.Enable = true;
}
}

该代码不起作用..所以请发送其他任何代码..



谢谢，
Viswanathan.M

This code is not work..So please send any other..



Thanks,
Viswanathan.M

推荐答案

switch (combo1.SelectedValue)
{
    case "India" : 
        combo3.Enabled = false;
        combo2.Enabled = true;
        break;
    case "Foreign" :
        combo3.Enabled = true;
        combo2.Enabled = false;
        break;
    default:
        combo3.Enabled = true;
        combo2.Enabled = true;
        break;
}

This is easily found on Google.

您也可以使用if语句将该任务归档(因为您的问题是是否combobox1 value =="india"，必须禁用第三个组合框)和(如果combobox1 value =="Foreign"，则第二个组合框将被禁用)

您可以创建一个函数来保存并使用它，或者只需在IDE的设计器视图中双击组合框即可.

受保护的void combobox1_SelectedIndexChanged(对象发送者，EventArgs e)
{
if(combobox1.SelectVelue ==印度")
{
combobox3.Enable = false;
combobox2.Enable = true;
}
否则，如果(combobox1.SelectVelue ==外来")
{
combobox3.Enable = true;
combobox2.Enable = False;
}
其他
{
combobox3.Enable = true;
combobox2.Enable = true;
}
}

You as well archive this task using an if statement (Becasue your question is if combobox1 value == "india" the third combo box will have to disabled) and (If combobox1 value == "Foreign" 2nd combo box will have to disabled)

You can create a function to hold this and use it like this or just Double click the combo box from the designer view in your IDE

protected void combobox1_SelectedIndexChanged(object sender, EventArgs e)
{
if(combobox1.SelectVelue == "indian")
{
combobox3.Enable = false;
combobox2.Enable = true;
}
else if (combobox1.SelectVelue == "Foreign")
{
combobox3.Enable = true;
combobox2.Enable = False;
}
Else
{
combobox3.Enable = true;
combobox2.Enable = true;
}
}

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