错误：“索引超出范围”在GridView中 [英] error :"index was out of range" in GridView

问题描述

我有一个gridview，我想得到SELECT列值，如果它是真的那么得到ID列值但我得到错误：索引超出范围。必须是非负的并且小于<的大小

集合

我的代码：

I have a gridview,I want to get SELECT column value and if it was true then get ID column value but i got the error :"index was out of range. must be non-negative and less than the size of
the collection "
my code:

private void GrdSign_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            DataGridViewSelectedRowCollection rows = GrdSign.SelectedRows;
            if (Convert.ToBoolean(rows[0].Cells["Select"].Value))
            {
                signIDs += (string)rows[0].Cells["ID"].Value.ToString()+"#";
            }
        }

推荐答案

试试

Try

if(rows[0].Cells["Select"].value != string.Empty && rows[0].Cells["Select"].value != null)
{
if (Convert.ToBoolean(rows[0].Cells["Select"].Value))
            {
                signIDs += (string)rows[0].Cells["ID"].Value.ToString()+"#";
            }
}

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