标签: formatexception

我不知道为什么抛出异常,这是工作代码:

DateTime.Parse("1/12/2012 12:00:00 AM")

这是抛出异常的那个:

DateTime.Parse("1/13/2012 12:00:00 AM")

抛出的异常是"FormatException",包含此消息: "字符串未被识别为有效的DateTime".

这是CurrentCulture值:

System.Globalization.CultureInfo.CurrentCulture
{en-MY}
Calendar: {System.Globalization.GregorianCalendar}
CompareInfo: {CompareInfo - en-MY}
CultureTypes: SpecificCultures | InstalledWin32Cultures
DateTimeFormat: {System.Globalization.DateTimeFormatInfo}
DisplayName: "English (Malaysia)"
EnglishName: "English (Malaysia)"
IetfLanguageTag: "en-MY"
IsNeutralCulture: false
IsReadOnly: true
KeyboardLayoutId: 17417
LCID: 17417
Name: "en-MY"
NativeName: "English (Malaysia)"
NumberFormat: {System.Globalization.NumberFormatInfo}
OptionalCalendars: {System.Globalization.Calendar[2]}
Parent: {en}
TextInfo: {TextInfo - en-MY}
ThreeLetterISOLanguageName: "eng"
ThreeLetterWindowsLanguageName: "ENM"
TwoLetterISOLanguageName: "en"
UseUserOverride: true

有谁知道这里发生了什么？

我收到System.FormatException:运行此方法时输入字符串的格式不正确.

字段的值:

arrayName = "requester";
fieldList = "\"name\" : \"shimshon\""; // "name" : "shimshon"


public override string ToString()
{
   var val = string.Format("\"{0}\" : { {1} }", arrayName, fieldList);

   return val;
}

该方法的期望结果是

"requester" : { "name" : "shimshon" }

这种格式有什么问题？

我正在尝试设置我的Font Family组合框的选定值,该组合框已填充以下XAML:

<ComboBox ItemsSource="{x:Static Fonts.SystemFontFamilies}" Name="cboFont">
    <ComboBox.ItemsPanel>
        <ItemsPanelTemplate>
            <VirtualizingStackPanel MinWidth="256" />
        </ItemsPanelTemplate>
    </ComboBox.ItemsPanel>
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Margin="2" Text="{Binding}" FontFamily="{Binding}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

我必须将组合框设置为字符串,但这会导致FormatExceptions.任何人都可以快速告诉我组合框将期待什么类,以及如何将字符串例如"Arial"转换为该格式？

我在c#中的代码下面,我将我的字符串类型格式日期转换为datetime,但是给出了错误.

if (!string.IsNullOrEmpty(SessionDictionary.GetValue("UserDetails", "ExpiryDate")))
{
    DateTime ExpiryDate = DateTime.ParseExact(SessionDictionary.GetValue("UserDetails", "ExpiryDate"), "dd mmm yy", null);                      
    strDate = sitedata.FormatDate(ExpiryDate, TridionDateFormat.ShortDate);
}
else
{
    strDate = "-";
}

我SessionDictionary.GetValue("UserDetails", "ExpiryDate")的字符串类型数据返回"31/01/2011 00:00:00"格式日期,在我使用DateTime.ParseExact它的上面的代码中给我System.FormatException: String was not recognized as a valid DateTime.错误.

请说明出了什么问题.

谢谢.

为什么这段代码会抛出异常？

var dateTime = "2012-03-21_15.12";
var format = new DateTimeFormatInfo()
{
   FullDateTimePattern = "yyyy-MM-dd-HH_mm.ss"
};

// FormatException: String was not recognized as a valid DateTime.
var parse = DateTime.Parse(dateTime, format); 

我已经创建了一个程序,并对它进行了大量测试,我收到一条错误消息"FormatException未处理,输入字符串格式不正确".当我将任一文本框留空并按下"完成"按钮但如果我输入低于0或高于59的任何值 - 这是我想要允许的数字范围,它会正常工作.我怎么办？当盒子空白时,我没有收到这个错误？这是'btnFinished'背后的代码:

   private void btnFinished_Click(object sender, EventArgs e)
    {
        if (lstCyclists.SelectedIndex >= 0)
        {
            Cyclists currentCyc = (Cyclists)lstCyclists.SelectedItem;
            //Decalre the minsEntered and secsEntered variables for txtMins and textSecs
            int minsEntered = int.Parse(txtMins.Text);
            int secsEntered = int.Parse(txtSecs.Text);

            try
            {
                //If the status of a cyclist is already set to Finished, show an error
                if (currentCyc.Finished.ToString() == "Finished")
                {
                    MessageBox.Show("A time has already been entered for this cyclist");
                }
                else
                {
                    //if a minute lower than 0 or greater than 59 …

class Program
{
    static void Main(string[] args)
    {
        string str = "0.898";
        double dbl = Double.Parse(str);

        dbl++;

        Console.WriteLine(dbl);
        Console.ReadLine();
    }
}

我需要工作的所有其他格式,如"100"工作.但是只要我添加一个"点",我就会FormatException出错.

嗨，我正在尝试制作简单的计算器，因为我是 C# 新手并且不熟悉，无论如何，当我尝试通过 try catch 处理格式异常时，当我输入一个值而不是数字时，我没有工作，它总是抛出异常不执行 catch 块

try
{
  Val1 = double.Parse(opr1.Text);
  Val2 = double.Parse(opr2.Text);
  double sum = Val1 + Val2;
  label1.Text = sum.ToString();
}
catch(Exception ex //or FormatException) 
{
  label1.Text = "Please enter the proper data type";
}

在不执行 catch 块的情况下尝试转换错误的值时总是会出错

错误:mscorlib.dll中出现未处理的"System.FormatException"类型异常

附加信息:索引(从零开始)必须大于或等于零且小于参数列表的大小.

namespace Inheritance
{
    abstract class Airlines
    {
        public int Aid;
        protected string Aname, DOD, ToAdd, ToFrom, FromAdd;
        protected float Cost;
        public void Accept()
        {
            Console.WriteLine("Enter the Aid,Aname");
            Aid = Convert.ToInt32(Console.ReadLine());
            Aname = Console.ReadLine();
            Console.WriteLine("Enter DOD,ToAdd,FromAdd");
            DOD = Console.ReadLine();
            ToAdd = Console.ReadLine();
            FromAdd = Console.ReadLine();
            Console.WriteLine("Enter the  Cost");
            Cost = Convert.ToSingle(Console.ReadLine());
        }

        public abstract void DisplayInfo();
        public abstract void facility();
    }
    abstract class SpiceJet : Airlines
    {
        string PaymentMode;
        public void AcceptData()
        {
            //Console.WriteLine("Welcome");
            Accept();
        }

        public void payment() …

I use the following line to convert the datarow value into double.

double.parse(Convert.ToString(datarow));

If the datarow is DBNULL, I am getting the following exception:

'double.Parse(Convert.ToString(data))' threw an exception of type 'System.FormatException'

How to handle this one without using tryparse.