将long转换为System.Int64抛出错误？

Question

我得到了一个让我感到困惑的奇怪错误:我有一个函数..uhm ...这样的事情:

void someFunctionTakingALong( long ID)
{
  var table = new DataTable();
  table .Columns.Add(new DataColumn("RID", Type.GetType("System.Int64")));
  table.Rows.Add(ID);       //<-- throws err
}

抛出此错误:

System.ArgumentException: Input string was not in a correct format.Couldn't store  in RID Column.  Expected type is Int64. ---> System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt64(String value, NumberStyles options, NumberFormatInfo numfmt)
   at System.String.System.IConvertible.ToInt64(IFormatProvider provider)
   at System.Data.Common.Int64Storage.Set(Int32 record, Object value)
   at System.Data.DataColumn.set_Item(Int32 record, Object value)
   --- End of inner exception stack trace ---

这种情况发生在生产中,而且我没有日志来查看实际传递给函数的ID的值...但即便如此......如果参数为a,则至少要保证ID是一个很长的... ？那为什么要扔？哪些值可以ID不能转换为int64？

编辑:

以下是实际来源:Trhowing列是PropValueID

public void AddRule(int PropID, long PropValueID, int type, string Data)
        {
            if (!m_HasRule)
            {
                m_Rules = new DataTable();
                m_Rules.Columns.Add(new DataColumn("RID", Type.GetType("System.Int32")));
                m_Rules.Columns.Add(new DataColumn("PropID", Type.GetType("System.Int32")));
                m_Rules.Columns.Add(new DataColumn("PropValueID", Type.GetType("System.Int64")));
                //m_Rules.Columns.Add(new DataColumn("PropValue", Type.GetType("System.String")));
                m_Rules.Columns.Add(new DataColumn("Type", Type.GetType("System.Int32")));
                m_Rules.Columns.Add(new DataColumn("Data", Type.GetType("System.String")));
                m_HasRule = true;
            }
            ToStringSB = null;

            if (type<2)  // a "Is/Not specified property"
            {            
                if (string.IsNullOrEmpty(Data)) //is specified (0,1)
                   m_Rules.Rows.Add(m_RID, PropID, 0, type, "");       //<<-- here we pass 0 (int32) instead of long.. could this be it? Stack says this is not the line throwing
                else  //is equal to/is not equal to(2,3) 
                    m_Rules.Rows.Add(m_RID, PropID, PropValueID,3-type, Data);                
            }else
                if ((type > 3) && (type < 6)) // a "like/not like" rule
                {
                    // "Like" or "not like" DATA .. no value ID is provided
                    m_Rules.Rows.Add(m_RID, PropID, PropValueID, type, Data); //<<-- Stack says it throws here 

                }
                else // a greater/lesser rule
                {
                    m_Rules.Rows.Add(m_RID, PropID, PropValueID, type, Data);
                }

        } 

有一个可疑行,我们传递文字0(一个int),但这不是堆栈说它抛出的行号.

Answer 1

无法重现 - 这对我来说很好:

using System;
using System.Data;

class Test
{
    static void Main()
    {
        long x = 10;
        var table = new DataTable();
        table.Columns.Add(new DataColumn("RID", Type.GetType("System.Int64")));
        table.Rows.Add(x);
    }
}

请注意,您可以Type.GetType()通过使用来摆脱调用typeof(long).

看起来由于某种原因它将值转换为字符串并返回,这真的很奇怪......你确定它只是来自那个代码吗？

如果你能想出一个简短而完整的例子,比如我的但却失败了,那真的会有所帮助.