[英]C# converting a string to double
我正在嘗試將字符串轉換為雙精度但無法這樣做...
我試圖模擬一個偽代碼,這是我的應用程序的一部分,文本值來自我無法控制的第三方應用程序。
我需要將以通用格式“ G”表示的字符串轉換為雙精度值,並在文本框中顯示該字符串。
string text = "G4.444444E+16";
double result;
if (!double.TryParse(text, NumberStyles.Any, CultureInfo.InvariantCulture, out result))
{
}
我嘗試通過更改numberstyles和cultureinfo進行嘗試,但結果始終返回0。建議代碼出了什么問題?
只是擺脫這個"G"
string text = "G4.444444E+16";
string text2 = text.SubString(1); // skip first character
double result;
if (!double.TryParse(text2, NumberStyles.Any,
CultureInfo.InvariantCulture, out result))
{
}
這是更多詳細信息:
Thread.CurrentThread.CurrentCulture = new CultureInfo("ru-RU");
// if input string format is different than a format of current culture
// input string is considered invalid, unless input string format culture is provided as additional parameter
string input = "1 234 567,89"; // Russian Culture format
// string input = "1234567.89"; // Invariant Culture format
double result = 9.99; // preset before conversion to see if it changes
bool success = false;
// never fails
// if conversion is impossible - returns false and default double (0.00)
success = double.TryParse(input, out result);
success = double.TryParse(input, NumberStyles.Number, CultureInfo.InvariantCulture, out result);
result = 9.99;
// if input is null, returns default double (0.00)
// if input is invalid - fails (Input string was not in a correct format exception)
result = Convert.ToDouble(input);
result = Convert.ToDouble(input, CultureInfo.InvariantCulture);
result = 9.99;
// if input is null - fails (Value cannot be null)
// if input is invalid - fails (Input string was not in a correct format exception)
result = double.Parse(input);
result = double.Parse(input, CultureInfo.InvariantCulture);
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