我正在添加一些计算部分,我将默认值15设置为此文本框txtVatno
我想计算默认值,我删除了默认值,我可以输入值,现在计算工作正常,但我想计算默认值15%
计算
GrossAmount = 1500
VAT(+) = 15
总金额
<asp:TextBox ID="txtGrossAmount" ClientIDMode="Static" runat="server" CssClass="form-control" onkeypress="return isNumberKey(event)" onkeydown="return (!((event.keyCode>=65 && event.keyCode <= 95) || event.keyCode >= 106) && event.keyCode!=32);" Enabled="false" ></asp:TextBox>
增值税= 15%
<asp:TextBox ID="txtVatno" ClientIDMode="Static" runat="server" AutoPostBack="true" CssClass="form-control contentTransparent" OnTextChanged="txtVatno_TextChanged" value="15" ></asp:TextBox>
<asp:TextBox ID="txtTax" ClientIDMode="Static" runat="server" CssClass="form-control " ReadOnly="true"></asp:TextBox>
代码部分
private void calculate()
{
txtTax.Text = (Double.Parse(txtGrossAmount.Text) * Double.Parse(txtVatno.Text) / 100.0).ToString("#0.00");
if (txtGrossAmount.Text == "")
{
txtGrossAmount.Text = "0";
}
}
protected void txtVatno_TextChanged(object sender, EventArgs e)
{
calculate();
}
答案 0 :(得分:0)
要使default
生效,请在calculate()
上调用Page_Load
方法。
protected void Page_Load(object sender, EventArgs e)
{
calculate();
}
您也可以通过将百分比括号calculate
分组来更改(Double.Parse(txtVatno.Text) / 100.0))
方法,如下所示。
private void calculate()
{
if (txtGrossAmount.Text == "")
{
txtGrossAmount.Text = "0";
}
txtTax.Text = (Double.Parse(txtGrossAmount.Text) * (Double.Parse(txtVatno.Text) / 100.0)).ToString("#0.00");
}