C# 将文本框中的数字乘以数量值
我有一个名为Amount的文本框和一个名为quantity1的NumericUpDown。如何将文本框乘以NumericUpdown值的两倍C# 将文本框中的数字乘以数量值,c#,numericupdown,C#,Numericupdown,我有一个名为Amount的文本框和一个名为quantity1的NumericUpDown。如何将文本框乘以NumericUpdown值的两倍 double amt; double ans; amt = Double.Parse(Amount.Text); tot = Double.Parse(Total.Text); //I have another textbox called total. ans = amt * (quantity1.Value) //how do i do this?
double amt;
double ans;
amt = Double.Parse(Amount.Text);
tot = Double.Parse(Total.Text);
//I have another textbox called total.
ans = amt * (quantity1.Value) //how do i do this? it has error.
将quantity1.value的值转换为double,然后应用乘法,然后将结果转换为string并分配给textbox。这可能会解决您的问题您得到了答案,但当您说有错误时,如果您在问题中添加错误文本,将有助于其他人快速回答您的问题。谢谢
double amt = Convert.ToDouble(Amount.Text);
double qnt = Convert.ToDouble(quantity.Value);
double ans = amt * qnt;
Total.Text = ans.ToString();