c# - 以编程方式向 DataTable 添加新行 C#

Question

我有一个从数据库中填充的数据表，后面的代码试图在每行之后再添加 3 行。下面是代码。但是在第 6 行我得到了

Exception of type 'System.OutOfMemoryException' was thrown.

  for (int i = 0; i < AlldaysList.Rows.Count; i++)
    {
        DataRow row;
        row = AlldaysList.NewRow();
        DataRow row1;
        row1 = AlldaysList.NewRow();
        DataRow row2;
        row2 = AlldaysList.NewRow();

        // Then add the new row to the collection.
        row["scenarionid"] = DBNull.Value;
        row["description"] = "";
        row1["scenarionid"] = DBNull.Value;
        row1["description"] = "";
        row2["scenarionid"] = DBNull.Value;
        row2["description"] = "";
        AlldaysList.Rows.InsertAt(row, i + 1);
        AlldaysList.Rows.InsertAt(row1, i + 2);
        AlldaysList.Rows.InsertAt(row2, i + 3);
        i++;
    }

Answer 1

//This could be the problem
i < AlldaysList.Rows.Count

我想你应该有一个变量叫做 int rowCount = AlldaysList.Rows.Count;在循环之前..

the loop should be  for (int i = 0; i < rowCount; i++)

我之所以这样说是因为如果你在循环中添加 3 行，你的 AlldaysList.Rows.Count 会改变 +3，你的目标是动态变量而不是静态变量，所以它再次进入循环并且导致异常..