将date.time格式的字符串从moment.js转换为C＃格式

时间：2018-08-03 03:22:19

标签： c# momentjs datetime-format

是否存在任何将日期和时间格式从moment.js转换为C#的功能/库？

我将从moment.js接收日期和时间格式（仅格式，没有日期和时间值），并需要在C#中显示。

例如：

YYYY-MM-DD h:mm A
//this is the format received from moment.js

然后，如果我在DateTime中有一个C#，则需要将其显示为

2018-06-14 2:30 PM
//this is equivalent with YYYY-MM-dd h:mm tt

我需要这样的东西：

string ConvertToCustomDateTimeFormat(string momentJsFormat){
   // should convert all moment.js date and time format to https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings
}

然后我可以这样使用它：

string dateTimeFormat = ConvertToCustomDateTimeFormat("YYYY-MM-DD h:mm A");
//dateTimeFormat value should be YYYY-MM-dd h:mm tt
string formattedDateTime = myDateTime.ToString(dateTimeFormat);
Console.WriteLine(formattedDateTime);
// output will be 2018-06-14 2:30 PM

2 个答案:

答案 0 :(得分：3)

我在here中发现了一个将日期和时间格式从C#转换为moment.js的函数。因此，我基于此功能创建了一个相反的功能（从moment.js到C#）。我把它张贴在这里，以防有人需要。

/// <summary>
/// Class to help convert moment.js date and time format to C# format
/// </summary>
public static class MomentJSConverter
{
    private enum State
    {
        None,
        LowerA,
        CapitalA,
        LowerD1,
        LowerD2,
        LowerD3,
        LowerD4,
        CapitalD1,
        CapitalD2,
        LowerH1,
        LowerH2,
        CapitalH1,
        CapitalH2,
        LowerM1,
        LowerM2,
        CapitalM1,
        CapitalM2,
        CapitalM3,
        CapitalM4,
        LowerS1,
        LowerS2,
        CapitalS1,
        CapitalS2,
        CapitalS3,
        CapitalS4,
        CapitalS5,
        CapitalS6,
        CapitalS7,
        CapitalY1,
        CapitalY2,
        CapitalY3,
        CapitalY4,
        CapitalZ
    }

    public static string GenerateCSharpFormatString(string momentJsFormat)
    {
        StringBuilder resultBuilder = new StringBuilder();
        State resultState = State.None;
        StringBuilder tokenBuffer = new StringBuilder();

        var ChangeState = new Action<State>((State fNewState) =>
        {
            switch (resultState)
            {
                case State.LowerA:
                case State.CapitalA:
                    resultBuilder.Append("tt");
                    break;
                case State.LowerD3:
                    resultBuilder.Append("ddd");
                    break;
                case State.LowerD4:
                    resultBuilder.Append("dddd");
                    break;
                case State.CapitalD1:
                    resultBuilder.Append("d");
                    break;
                case State.CapitalD2:
                    resultBuilder.Append("dd");
                    break;
                case State.LowerH1:
                    resultBuilder.Append("h");
                    break;
                case State.LowerH2:
                    resultBuilder.Append("hh");
                    break;
                case State.CapitalH1:
                    resultBuilder.Append("H");
                    break;
                case State.CapitalH2:
                    resultBuilder.Append("HH");
                    break;
                case State.LowerM1:
                    resultBuilder.Append("m");
                    break;
                case State.LowerM2:
                    resultBuilder.Append("mm");
                    break;
                case State.CapitalM1:
                    resultBuilder.Append("M");
                    break;
                case State.CapitalM2:
                    resultBuilder.Append("MM");
                    break;
                case State.CapitalM3:
                    resultBuilder.Append("MMM");
                    break;
                case State.CapitalM4:
                    resultBuilder.Append("MMMM");
                    break;
                case State.LowerS1:
                    resultBuilder.Append("s");
                    break;
                case State.LowerS2:
                    resultBuilder.Append("ss");
                    break;
                case State.CapitalS1:
                    resultBuilder.Append("f");
                    break;
                case State.CapitalS2:
                    resultBuilder.Append("ff");
                    break;
                case State.CapitalS3:
                    resultBuilder.Append("fff");
                    break;
                case State.CapitalS4:
                    resultBuilder.Append("ffff");
                    break;
                case State.CapitalS5:
                    resultBuilder.Append("fffff");
                    break;
                case State.CapitalS6:
                    resultBuilder.Append("ffffff");
                    break;
                case State.CapitalS7:
                    resultBuilder.Append("fffffff");
                    break;
                case State.CapitalY2:
                    resultBuilder.Append("yy");
                    break;
                case State.CapitalY4:
                    resultBuilder.Append("yyyy");
                    break;
                case State.CapitalZ:
                    resultBuilder.Append("zzz");
                    break;
            }

            tokenBuffer.Clear();
            resultState = fNewState;
        });

        foreach (var character in momentJsFormat)
        {
            switch (character)
            {
                case 'a':
                    switch (resultState)
                    {
                        case State.LowerA:
                            break;
                        default:
                            ChangeState(State.LowerA);
                            break;
                    }
                    break;
                case 'A':
                    switch (resultState)
                    {
                        case State.CapitalA:
                            break;
                        default:
                            ChangeState(State.CapitalA);
                            break;
                    }
                    break;
                case 'd':
                    switch (resultState)
                    {
                        case State.LowerD1:
                            resultState = State.LowerD2;
                            break;
                        case State.LowerD2:
                            resultState = State.LowerD3;
                            break;
                        case State.LowerD3:
                            resultState = State.LowerD4;
                            break;
                        case State.LowerD4:
                            break;
                        default:
                            ChangeState(State.LowerD1);
                            break;
                    }
                    break;
                case 'D':
                    switch (resultState)
                    {
                        case State.CapitalD1:
                            resultState = State.CapitalD2;
                            break;
                        case State.CapitalD2:
                            break;
                        default:
                            ChangeState(State.CapitalD1);
                            break;
                    }
                    break;
                case 'h':
                    switch (resultState)
                    {
                        case State.LowerH1:
                            resultState = State.LowerH2;
                            break;
                        case State.LowerH2:
                            break;
                        default:
                            ChangeState(State.LowerH1);
                            break;
                    }
                    break;
                case 'H':
                    switch (resultState)
                    {
                        case State.CapitalH1:
                            resultState = State.CapitalH2;
                            break;
                        case State.CapitalH2:
                            break;
                        default:
                            ChangeState(State.CapitalH1);
                            break;
                    }
                    break;
                case 'm':
                    switch (resultState)
                    {
                        case State.LowerM1:
                            resultState = State.LowerM2;
                            break;
                        case State.LowerM2:
                            break;
                        default:
                            ChangeState(State.LowerM1);
                            break;
                    }
                    break;
                case 'M':
                    switch (resultState)
                    {
                        case State.CapitalM1:
                            resultState = State.CapitalM2;
                            break;
                        case State.CapitalM2:
                            resultState = State.CapitalM3;
                            break;
                        case State.CapitalM3:
                            resultState = State.CapitalM4;
                            break;
                        case State.CapitalM4:
                            break;
                        default:
                            ChangeState(State.CapitalM1);
                            break;
                    }
                    break;
                case 's':
                    switch (resultState)
                    {
                        case State.LowerS1:
                            resultState = State.LowerS2;
                            break;
                        case State.LowerS2:
                            break;
                        default:
                            ChangeState(State.LowerS1);
                            break;
                    }
                    break;
                case 'S':
                    switch (resultState)
                    {
                        case State.CapitalS1:
                            resultState = State.CapitalS2;
                            break;
                        case State.CapitalS2:
                            resultState = State.CapitalS3;
                            break;
                        case State.CapitalS3:
                            resultState = State.CapitalS4;
                            break;
                        case State.CapitalS4:
                            resultState = State.CapitalS5;
                            break;
                        case State.CapitalS5:
                            resultState = State.CapitalS6;
                            break;
                        case State.CapitalS6:
                            resultState = State.CapitalS7;
                            break;
                        case State.CapitalS7:
                            break;
                        default:
                            ChangeState(State.CapitalS1);
                            break;
                    }
                    break;
                case 'Y':
                    switch (resultState)
                    {
                        case State.CapitalY1:
                            resultState = State.CapitalY2;
                            break;
                        case State.CapitalY2:
                            resultState = State.CapitalY3;
                            break;
                        case State.CapitalY3:
                            resultState = State.CapitalY4;
                            break;
                        case State.CapitalY4:
                            break;
                        default:
                            ChangeState(State.CapitalY1);
                            break;
                    }
                    break;
                case 'Z':
                    switch (resultState)
                    {
                        case State.CapitalZ:
                            break;
                        default:
                            ChangeState(State.CapitalZ);
                            break;
                    }
                    break;
                default:
                    ChangeState(State.None);
                    resultBuilder.Append(character);
                    break;
            }
        }

        ChangeState(State.None);
        return resultBuilder.ToString();
    }
}

答案 1 :(得分：0)

我增加了对文字字符串的支持。

public static class MomentJSConverter
{
private enum State
{
    None,
    LowerA,
    CapitalA,
    LowerD1,
    LowerD2,
    LowerD3,
    LowerD4,
    CapitalD1,
    CapitalD2,
    LowerH1,
    LowerH2,
    CapitalH1,
    CapitalH2,
    LowerM1,
    LowerM2,
    CapitalM1,
    CapitalM2,
    CapitalM3,
    CapitalM4,
    LowerS1,
    LowerS2,
    CapitalS1,
    CapitalS2,
    CapitalS3,
    CapitalS4,
    CapitalS5,
    CapitalS6,
    CapitalS7,
    CapitalY1,
    CapitalY2,
    CapitalY3,
    CapitalY4,
    CapitalZ
}

private static string InnerGenerateCSharpFormatString(string momentJsFormat)
{
    StringBuilder resultBuilder = new StringBuilder();
    State resultState = State.None;
    StringBuilder tokenBuffer = new StringBuilder();

    var ChangeState = new Action<State>((State fNewState) =>
    {
        switch (resultState)
        {
            case State.LowerA:
            case State.CapitalA:
                resultBuilder.Append("tt");
                break;
            case State.LowerD3:
                resultBuilder.Append("ddd");
                break;
            case State.LowerD4:
                resultBuilder.Append("dddd");
                break;
            case State.CapitalD1:
                resultBuilder.Append("d");
                break;
            case State.CapitalD2:
                resultBuilder.Append("dd");
                break;
            case State.LowerH1:
                resultBuilder.Append("h");
                break;
            case State.LowerH2:
                resultBuilder.Append("hh");
                break;
            case State.CapitalH1:
                resultBuilder.Append("H");
                break;
            case State.CapitalH2:
                resultBuilder.Append("HH");
                break;
            case State.LowerM1:
                resultBuilder.Append("m");
                break;
            case State.LowerM2:
                resultBuilder.Append("mm");
                break;
            case State.CapitalM1:
                resultBuilder.Append("M");
                break;
            case State.CapitalM2:
                resultBuilder.Append("MM");
                break;
            case State.CapitalM3:
                resultBuilder.Append("MMM");
                break;
            case State.CapitalM4:
                resultBuilder.Append("MMMM");
                break;
            case State.LowerS1:
                resultBuilder.Append("s");
                break;
            case State.LowerS2:
                resultBuilder.Append("ss");
                break;
            case State.CapitalS1:
                resultBuilder.Append("f");
                break;
            case State.CapitalS2:
                resultBuilder.Append("ff");
                break;
            case State.CapitalS3:
                resultBuilder.Append("fff");
                break;
            case State.CapitalS4:
                resultBuilder.Append("ffff");
                break;
            case State.CapitalS5:
                resultBuilder.Append("fffff");
                break;
            case State.CapitalS6:
                resultBuilder.Append("ffffff");
                break;
            case State.CapitalS7:
                resultBuilder.Append("fffffff");
                break;
            case State.CapitalY2:
                resultBuilder.Append("yy");
                break;
            case State.CapitalY4:
                resultBuilder.Append("yyyy");
                break;
            case State.CapitalZ:
                resultBuilder.Append("zzz");
                break;
        }

        tokenBuffer.Clear();
        resultState = fNewState;
    });

    foreach (var character in momentJsFormat)
    {
        switch (character)
        {
            case 'a':
                switch (resultState)
                {
                    case State.LowerA:
                        break;
                    default:
                        ChangeState(State.LowerA);
                        break;
                }
                break;
            case 'A':
                switch (resultState)
                {
                    case State.CapitalA:
                        break;
                    default:
                        ChangeState(State.CapitalA);
                        break;
                }
                break;
            case 'd':
                switch (resultState)
                {
                    case State.LowerD1:
                        resultState = State.LowerD2;
                        break;
                    case State.LowerD2:
                        resultState = State.LowerD3;
                        break;
                    case State.LowerD3:
                        resultState = State.LowerD4;
                        break;
                    case State.LowerD4:
                        break;
                    default:
                        ChangeState(State.LowerD1);
                        break;
                }
                break;
            case 'D':
                switch (resultState)
                {
                    case State.CapitalD1:
                        resultState = State.CapitalD2;
                        break;
                    case State.CapitalD2:
                        break;
                    default:
                        ChangeState(State.CapitalD1);
                        break;
                }
                break;
            case 'h':
                switch (resultState)
                {
                    case State.LowerH1:
                        resultState = State.LowerH2;
                        break;
                    case State.LowerH2:
                        break;
                    default:
                        ChangeState(State.LowerH1);
                        break;
                }
                break;
            case 'H':
                switch (resultState)
                {
                    case State.CapitalH1:
                        resultState = State.CapitalH2;
                        break;
                    case State.CapitalH2:
                        break;
                    default:
                        ChangeState(State.CapitalH1);
                        break;
                }
                break;
            case 'm':
                switch (resultState)
                {
                    case State.LowerM1:
                        resultState = State.LowerM2;
                        break;
                    case State.LowerM2:
                        break;
                    default:
                        ChangeState(State.LowerM1);
                        break;
                }
                break;
            case 'M':
                switch (resultState)
                {
                    case State.CapitalM1:
                        resultState = State.CapitalM2;
                        break;
                    case State.CapitalM2:
                        resultState = State.CapitalM3;
                        break;
                    case State.CapitalM3:
                        resultState = State.CapitalM4;
                        break;
                    case State.CapitalM4:
                        break;
                    default:
                        ChangeState(State.CapitalM1);
                        break;
                }
                break;
            case 's':
                switch (resultState)
                {
                    case State.LowerS1:
                        resultState = State.LowerS2;
                        break;
                    case State.LowerS2:
                        break;
                    default:
                        ChangeState(State.LowerS1);
                        break;
                }
                break;
            case 'S':
                switch (resultState)
                {
                    case State.CapitalS1:
                        resultState = State.CapitalS2;
                        break;
                    case State.CapitalS2:
                        resultState = State.CapitalS3;
                        break;
                    case State.CapitalS3:
                        resultState = State.CapitalS4;
                        break;
                    case State.CapitalS4:
                        resultState = State.CapitalS5;
                        break;
                    case State.CapitalS5:
                        resultState = State.CapitalS6;
                        break;
                    case State.CapitalS6:
                        resultState = State.CapitalS7;
                        break;
                    case State.CapitalS7:
                        break;
                    default:
                        ChangeState(State.CapitalS1);
                        break;
                }
                break;
            case 'Y':
                switch (resultState)
                {
                    case State.CapitalY1:
                        resultState = State.CapitalY2;
                        break;
                    case State.CapitalY2:
                        resultState = State.CapitalY3;
                        break;
                    case State.CapitalY3:
                        resultState = State.CapitalY4;
                        break;
                    case State.CapitalY4:
                        break;
                    default:
                        ChangeState(State.CapitalY1);
                        break;
                }
                break;
            case 'Z':
                switch (resultState)
                {
                    case State.CapitalZ:
                        break;
                    default:
                        ChangeState(State.CapitalZ);
                        break;
                }
                break;
            default:
                ChangeState(State.None);
                resultBuilder.Append(character);
                break;
        }
    }

    ChangeState(State.None);
    return resultBuilder.ToString();
}

public static string GenerateCSharpFormatString(string momentJsFormat){
    string[] subStrs = Regex.Split(momentJsFormat, @"(\[[^\]]+\])");
    var res = new StringBuilder();
    foreach (var subStr in subStrs){
        if(subStr.Contains("[")){
            res.Append(Regex.Replace(subStr, @"[\[\]]", "'"));
        }else{
            res.Append(InnerGenerateCSharpFormatString(subStr));
        }
    }
    return res.ToString();
}
}
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