Formatting is Specified but argument is not IFormattable

private void DeviceSetText(TextBox textBox, string text)
{
//处理text的显示值
if (text != "0")  //小数位后保留2位
{
//小数点后保留2位小数
text = string.Format("{0:0.00}", text);
}
textBox.Invoke((MethodInvoker) delegate
{
textBox.Text = text;
});
}

text = string.Format("{0:0.00}", text);

和下面的问题类似

http://stackoverflow.com/questions/2849688/formatting-is-specified-but-argument-is-not-iformattable

string listOfItemPrices = items.ToSemiColonList(item => string.Format("{0:C}", item.Price.ToString()));

By passing

item.Price.ToString()

to

String.Format

, you are passing a string, not a decimal.
Since strings cannot be used with format strings, you're getting an error.

You need to pass the

Decimal

value to

String.Format

by removing

.ToString()

.

string.Format里面处理的是数字，但是传递了字符串，所以有这个提示