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/// <summary>
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/// 从泛型数组中递归删除不符合要求的项
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/// </summary>
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/// <param name="infos"></param>
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/// <param name="userid"></param>
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/// <returns></returns>
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public IList<New.Model.Info> CheckGrade(IList<New.Model.Info> infos, int userid,int i)
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{
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while(i<infos.Count)
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{
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int grade = infos[i].Grade;
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bool flag = false;
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switch (grade)
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{
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//do somthing
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}
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if (!flag)
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{
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infos.RemoveAt(i);
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this.CheckGrade(infos, userid, i);
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}
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else
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{
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i++;
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}
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}
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return infos;
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}

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