c# - 为什么 Visual Studio 说我的输入字符串格式不正确？

Question

以下代码：

string year = textBoxYear.Text;
string award = comboBoxAwards.Text;
string cat = comboBoxCategory.Text;
string title = textBoxTitle.Text;
string author = textBoxAuthor.Text;
string kindleASIN = textBoxKindleASIN.Text;
string hardboundASIN = textBoxHardboundASIN.Text;
string paperbackASIN = textBoxPaperbackASIN.Text;
string imgSrc = getImgSrc(kindleASIN, hardboundASIN, paperbackASIN);
string newRec = // Keeping year as int for LINQ querying (where year > or < such and such), and yearDisplay spans two years for some awards
    string.Format(
        "new BookClass{Award=\"{0}\", Year={1}, YearDisplay=\"{1}\", Category=\"{2}\", Title=\"{3}\", Author=\"{4}\", KindleASIN=\"{5}\", HardboundASIN=\"{6}\", PaperbackASIN=\"{7}\", ImgSrc=\"{8}\"},", award, year, cat, title, author, kindleASIN, hardboundASIN, paperbackASIN, imgSrc);

...使用这些数据：

year = "2013"
award = "Hugos"
cat = "Best Novel"
title == "Redshirts"
author == "John Scalzi"
kindleASIN == "B0079XPUOW"
hardboundASIN == "0765316994"
paperbackASIN == "0765334798"
imgSrc == "http://images.amazon.com/images/P/B0079XPUOW.01.MZZZZZZZ"

...在分配给 imgSrc 时死了，说：“ System.FormatException 未处理 HResult=-2146233033 Message=Input string was not in a correct format ”。

...并且“疑难解答提示”说，“将字符串转换为 DateTime 时，在将每个变量放入 DateTime 对象之前解析字符串以获取日期。 ”

但我没有将字符串转换为 DateTime ......可能是什么问题？

Answer 1

不是替换标记的花括号把它搞砸了

new BookClass{Award=\"{0}\", Year={1}, YearDisplay=\"{1}\"
      这里--^

您需要通过将它们加倍来转义{或使用它们，它们将在函数处理字符串}后显示为单个花括号。Format

string.Format(
        "new BookClass{{Award=\"{0}\", Year={1}, YearDisplay=\"{1}\", Category=\"{2}\", Title=\"{3}\", Author=\"{4}\", KindleASIN=\"{5}\", HardboundASIN=\"{6}\", PaperbackASIN=\"{7}\", ImgSrc=\"{8}\"}},", award, year, cat, title, author, kindleASIN, hardboundASIN, paperbackASIN, imgSrc);