在datagridview c＃中添加值

Question

我是编程和C＃的新手。我正在尝试为datagridview中的每一行添加某些列的值。 datagridview未链接到任何数据库，其值来自用户输入但失败。任何帮助将不胜感激。

这是我的代码：

double a,b,c,d,total = 0;

foreach(DataGridViewRow row in dataGridView1.Rows)
{
    foreach(DataGridViewColumn col in dataGridView1.Columns)
    {
        a = Convert.ToDouble(row.Cells[3].Value);
        b = Convert.ToDouble(row.Cells[4].Value);
        c = Convert.ToDouble(row.Cells[5].Value);
        d = Convert.ToDouble(row.Cells[6].Value);
        total = a + b + c + d;
        MessageBox.Show(total.ToString());
    }
}

Answer 1

您不需要内循环，删除它并获得解决方案

double a,b,c,d,total = 0;

foreach(DataGridViewRow row in dataGridView1.Rows)
{
        a = Convert.ToDouble(row.Cells[3].Value);
        b = Convert.ToDouble(row.Cells[4].Value);
        c = Convert.ToDouble(row.Cells[5].Value);
        d = Convert.ToDouble(row.Cells[6].Value);
        total = a + b + c + d;
        MessageBox.Show(total.ToString());
}