关于.net项目编码 [英] about .net project coding

问题描述

if (DropDownListCreateUserCity.SelectedValue)
{
    city = DropDownListCreateUserCity.SelectedValue;
}
else
{
    city = txtother.Text;
}

错误:无法将类型字符串"隐式转换为布尔" ....... plz帮我....

error:-cannot implicitly convert type .''string'' to ''bool''.......plz help me....

推荐答案

错误出现在If条件中:
尝试:

The error is in If Condition :
try :

if (DropDownListCreateUserCity.SelectedValue!="")
{
    city = DropDownListCreateUserCity.SelectedValue.ToString();
}
else
{
    city = txtother.Text;
}

此处城市应为字符串类型.


或者您也可以检查SelectedIndex，例如:

here city should be of string type.


or you can check SelectedIndex also, such as :

if (DropDownListCreateUserCity.SelectedIndex > 0)

将city的声明更改为字符串.
您可能必须将DropDownListCreateUserCity.SelectedValue强制转换为字符串，或者使用ToString方法.

Change the declaration of city to a string.
You may have to either cast DropDownListCreateUserCity.SelectedValue to a string, or use the ToString method.

更改您声明的城市类型，或者您可以检查
city = DropDownListCreateUserCity.SelectedValue.ToString();

change the type of city which u declare or u can check that
city = DropDownListCreateUserCity.SelectedValue.ToString();

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