添加行第二列ONLY - 填充使用for循环数据 [英] Adding rows to second column ONLY - populating data using a for loop

问题描述

我计算使用基于阅读多少条记录已经已经打开的文件的for循环行我想在我的第二列的数量。我已经研究并尝试各种解决方案，但没有工作，但它似乎很简单。下面是我当前的代码，我检索文件的长度，做一个快速的总和，进入一个for循环的地方（目前）我只能以填充第一列。

I calculate the amount of rows I want to have in my second column using a for loop based on reading how many records a file has that has been opened. I have researched and tried various solutions but nothing works, yet it seems so simple. Below is my current code where I retrieve the file's length and do a quick sum, entering a for loop where (at the moment) I am only able to populate the first column.

long Count = 1;
FileInfo Fi = new FileInfo(file);
long sum = (Fi.Length / 1024) - Count;

for (int i = 0; i < sum; i++)
{
    DataGridView1.Rows.Add(Count++);
}

我不知道怎么做，但我知道上面的代码增加在默认情况下的第一列 - 我不知道如何修改它。我知道是：

I'm not sure how to do it but I know the above code adds to the first column by default - I don't know how to modify it. I know by:

DataGridView1.Rows.Add("a","b");

...在'B'值显示在第二列，但我不希望在第一，其中A是。

... The 'b' value is displayed in the second column, but I don't want anything for now in the first where 'a' is.

我已经看过的插入有一列的DataGridView C＃行，但它关系到合并列，再说一次，我不想这样。

I have looked at insert a row with one column datagridview c# but it is related to merging columns, again, I don't want this.

DataGridView1.Rows.Add("",Count++);

作品在一定程度上，而不是做正确的方式。我将在稍后将数据添加到第一列。

Works to an extent, but is not the right way to do it. I'm going to be adding data to the first column later on.

推荐答案

如果你想忽略第一个值列，只需添加空或 DBNull.Value ，例如：

If you want to omit the value for the first column, just add null or DBNull.Value, e.g.:

DataGridView1.Rows.Add(DBNull.Value, Count++);

此方式，而第二列包含<$ C $的值的第一列将是空C>计数。

This way, the first column will be empty while the second columns contains the value of Count.

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