如何在.NET 3.5中再次使StringBuilder空？

我有一个循环,我根据某些条件创建一些字符串值.我确实将StringBuilder对象放在循环之外,每次我在循环中有新行时,我需要清除此行的StringBuilder附加值.

我如何清除这些？

        StringBuilder sb = new StringBuilder();

        foreach (DataRow row in recipientsList.Rows)
        {
            sb.Length = 0;
            sb.Append("
");
            if (row["needsToActivate"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutActivationTemplate());
            }
            if (row["needsToEnterSite"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutEnteringWebsiteForTwoWeeksTemplate());
            }
            if (row["needsPicture"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutPicturesTemplate());
            }
            if (row["needsText"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutTextTemplate());
            }
            if (row["needsCharacteristic"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutCharateristicsTemplate());
            }
            if (row["needsHobby"] == "1")
            {
                sb.AppendFormat("
{0}
", getUsersWithoutHobbiesTemplate());
            }
            sb.Append("
");
}

代码接受答案;

1> Alex K...：

---

你可以简单地;

sb.Length = 0;

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当你使用很长的字符串时,这不是最好的主意.它可能导致OOM异常.MSDN提供了更多解释:https://social.msdn.microsoft.com/Forums/en-US/db04ba8c-e13e-4d41-89a2-f5601ec3e0ae/outofmemoryexception-setting-stringbuilder-length-to-0?forum=vbgeneral

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你可以使用这个:sb.Remove(0,sb.Length);

2> PhilPursglov..：

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StringBuilder.Clear(); 是你想要的.

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这仅适用于.Net 4. .Net <= 3.5需要使用`sb.Length = 0;`

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.NET 3.5对不起!