c# - 如何避免 DivideByZeroException

Question

您好，当我尝试在 GridView 中运行以下代码时，我遇到了这个错误Attempted to divide by zero。

当发生错误而不避免被零除时，如何通过返回零作为除法结果来避免此错误。

代码

protected void gridpandl_RowDataBound(object sender, GridViewRowEventArgs e)
{
    try
    {
        for (int index = 0; index < this.gridpandl.Rows.Count; index++)
        {
            string Purchase = GetPurchase(this.gridpandl.Rows[index].Cells[0].Text);
            string Sales = GetSales(this.gridpandl.Rows[index].Cells[0].Text);
            string Serivce = GetService(this.gridpandl.Rows[index].Cells[0].Text);
            decimal Profit = (Convert.ToDecimal(Sales) + Convert.ToDecimal(Serivce) - Convert.ToDecimal(Purchase));
            decimal Profitprcn = (Profit * 100) / Convert.ToDecimal(Purchase);
            this.gridpandl.Rows[index].Cells[2].Text = Purchase;
            this.gridpandl.Rows[index].Cells[3].Text = Sales;
            this.gridpandl.Rows[index].Cells[4].Text = Serivce;
            this.gridpandl.Rows[index].Cells[5].Text = Profit.ToString();
            this.gridpandl.Rows[index].Cells[6].Text = Math.Round(Profitprcn, 2).ToString();
        }

    }

    catch (DivideByZeroException ex)
    {

    }
}

Answer 1

你应该使用 conditional operator (?:).

将 Profitprcn 行更改为:

decimal Profitprcn = Convert.ToDecimal(Purchase) ==0? 0 : (Profit * 100) / Convert.ToDecimal(Purchase);