protected void txtQty_TextChanged(object sender, EventArgs e)
{
checkForm();
}
//检验文本信息是否合法，如果合法则开始计算
protected void checkForm()
{
try
{
if (!IsNumberic(txtQty.Text) && txtQty.Text != "")
{
checkbool = false;
Response.Write("");
txtQty.Text = "";
txtQty.Focus();
}
else if (txtQty.Text != "")
{
Qty = int.Parse(txtQty.Text);
}
if (!IsNumberic(txtVat.Text) && txtVat.Text != "")
{
Response.Write("");
checkbool = false;
txtVat.Text = "";
txtVat.Focus();
}
else if (txtVat.Text != "")
{
Vat = Double.Parse(txtVat.Text);
}
if (!IsNumberic(txtUnitPrice.Text) && txtUnitPrice.Text != "")
{
Response.Write("");
checkbool = false;
txtUnitPrice.Text = "";
txtUnitPrice.Focus();
}
else if (txtUnitPrice.Text != "")
{
UnitPrice = Double.Parse(txtUnitPrice.Text);
}
if (checkbool == true)
{
if (Vat != 0 && ExVatAmount != 0)
{
AmountVat = ExVatAmount / (1 - Vat / 100);
txtAmountVat.Text = AmountVat.ToString();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
///
/// 名称：IsNumberic
/// 功能：判断输入的是否是数字
/// 参数：string oText：源文本
/// 返回值： bool true:是 false:否
///
public bool IsNumberic(string oText)
{
try
{
//从字符串到双精度值的转换，字符串转换为Double，如果成功则返回为真，否则返回为假。
Double var1 = Convert.ToDouble(oText);
return true;
}
catch
{
return false;
}
}
}
