从文本文件中的某一行读取一个数字

正如Stefan提到的那样，最好的方法是使用JSON。净:

var json = JsonConvert.DeserializeObject<Data>(str);
var value = json.MouseColorR;

str是json输入字符串。

Data类:

public class Data
{
    public bool SmartCursorToggle { get; set; }
    public bool MapEnabled { get; set; }
    public int InvasionBarMode { get; set; }
    public bool AutoSave { get; set; }
    public bool AutoPause { get; set; }
    public int Language { get; set; }
    public bool PlacementPreview { get; set; }
    public bool GoreVisualsAllowed { get; set; }
    public float VolumeSound { get; set; }
    public float VolumeAmbient { get; set; }
    public float VolumeMusic { get; set; }
    public string KeyUp { get; set; }
    public string KeyDown { get; set; }
    public string KeyLeft { get; set; }
    public string KeyRight { get; set; }
    public string KeyJump { get; set; }
    public string KeyThrowItem { get; set; }
    public string KeyInventory { get; set; }
    public string KeyQuickHeal { get; set; }
    public string KeyQuickMana { get; set; }
    public string KeyQuickBuff { get; set; }
    public string KeyUseHook { get; set; }
    public string KeyAutoSelect { get; set; }
    public string KeySmartCursor { get; set; }
    public string KeyMount { get; set; }
    public string KeyMapStyle { get; set; }
    public string KeyFullscreenMap { get; set; }
    public string KeyMapZoomIn { get; set; }
    public string KeyMapZoomOut { get; set; }
    public string KeyMapAlphaUp { get; set; }
    public string KeyMapAlphaDown { get; set; }
    public bool Fullscreen { get; set; }
    public bool WindowMaximized { get; set; }
    public int DisplayWidth { get; set; }
    public int DisplayHeight { get; set; }
    public int GraphicsQuality { get; set; }
    public bool BackgroundEnabled { get; set; }
    public bool FrameSkip { get; set; }
    public int LightingMode { get; set; }
    public int LightingThreads { get; set; }
    public int MouseColorR { get; set; }
    public int MouseColorG { get; set; }
    public int MouseColorB { get; set; }
    public float Parallax { get; set; }
    public bool ShowItemText { get; set; }
    public int LastLaunchedVersion { get; set; }
    public string ClientUUID { get; set; }
    public bool UseSmartCursorForCommonBlocks { get; set; }
    public bool UseSmartAxeAfterSmartPickaxe { get; set; }
    public bool UseSmartWallReplacement { get; set; }
    public bool DisableLeftShiftTrashCan { get; set; }
    public bool HighlightNewItems { get; set; }
    public bool HidePasswords { get; set; }
    public bool ThickMouseEdges { get; set; }
    public long ThickMouseEdgesPackedColor { get; set; }
    public bool ReverseUpDownForArmorSetBonuses { get; set; }
    public bool CloudSavingDefault { get; set; }
}

如果你不想使用JSON。如果你只需要这个值，你可以使用Regex:

var regex = new Regex("'MouseColorR': (''d{3})");
Match match = regex.Match(str);
if (match.Success)
{
    string v = match.Groups[1].Value;
}

您可以使用Dynamic访问任何JSON对象中的已知属性。假设您正在使用JSON。如其他回答和评论中提到的。NET，并且包含Json对象的文本文件名存储在变量fileName中，代码将如下:

dynamic json = JsonConvert.DeserializeObject(File.ReadAllText(fileName));
var value = json.MouseColorR