ASP.NET--表达式、运算符与分支结构（实战案例汇总2）
案例6
：查询自动售货机中商品的价格
步骤：
![clip_image003[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435777Rkee.jpg "clip_image003[1]")
其代码如下；
{
if (RadioButton1.Checked)
{
Label1.Text = RadioButton1.Text + "的价格是：3万";
}
else if (RadioButton2.Checked)
{
Label1.Text = RadioButton2.Text + "的价格是：4万";
}
else if (RadioButton3.Checked)
{
Label1.Text = RadioButton3.Text + "的价格是：5万";
}
else if (RadioButton4.Checked)
{
Label1.Text = RadioButton4.Text + "的价格是：6万";
}
else
{
Label1.Text = "请选择商品";
}
}
}
![clip_image005[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435782fxUg.jpg "clip_image005[1]")
![clip_image007[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435787viNE.jpg "clip_image007[1]")
![clip_image009[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435793xJw0.jpg "clip_image009[1]")
案例7
：商品打折查询
步骤：
其代码如下；
{
double huafei = 0;
if (TextBox1.Text == "")
{
Label1.Text = "请输入你所购物的总金额";
}
else
{
{
huafei = Convert.ToDouble(TextBox1.Text);
}
double shifu;
if (CheckBox1.Checked)
{
if (huafei >= 5000)
{
shifu = huafei * 0.55 * 0.95;
Label1.Text = shifu.ToString();
}
else if (huafei >= 2000)
{
shifu = huafei * 0.7 * 0.95;
Label1.Text = shifu.ToString();
}
else if (huafei >= 1000)
{
shifu = huafei * 0.8 * 0.95;
Label1.Text = shifu.ToString();
}
else if (huafei >= 500)
{
shifu = huafei * 0.9 * 0.95;
Label1.Text = shifu.ToString();
}
else if (huafei < 500)
{
shifu = huafei * 0.95;
Label1.Text = shifu.ToString();
}
else
{
Label1.Text = "请输入你所购物的总金额";
}
}
else
{
if (huafei >= 5000)
{
shifu = huafei * 0.55;
Label1.Text = shifu.ToString();
}
else if (huafei >= 2000)
{
shifu = huafei * 0.7;
Label1.Text = shifu.ToString();
}
else if (huafei >= 1000)
{
shifu = huafei * 0.8;
Label1.Text = shifu.ToString();
}
else if (huafei >= 500)
{
shifu = huafei * 0.9;
Label1.Text = shifu.ToString();
}
else if (huafei < 500)
{
shifu = huafei;
Label1.Text = shifu.ToString();
}
else
{
Label1.Text = "请输入你所购物的总金";
}
}
}
}
}
![clip_image011[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435798IZow.jpg "clip_image011[1]")
![clip_image013[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435805xihn.jpg "clip_image013[1]")
![clip_image014[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435807OJKo.jpg "clip_image014[1]")
![clip_image015[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435810vjeq.jpg "clip_image015[1]")
![clip_image016[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435813h6Ih.jpg "clip_image016[1]")
![clip_image017[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435815U5FR.jpg "clip_image017[1]")
![clip_image018[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435818p0l3.jpg "clip_image018[1]")
案例8
：计算并显示通话费用
步骤：
![clip_image019[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435819k1IG.jpg "clip_image019[1]")
其代码如下；
{
int shijian = 0;
if (TextBox1.Text == "")
{
Label1.Text = "请输入你的通话时间";
}
else
{
shijian = Convert.ToInt32(TextBox1.Text);
}
double huafei;
if (RadioButton1.Checked)
{
if (TextBox1.Text == "")
{
Label1.Text = "请输入你的通话时间";
}
else if (shijian > 3)
{
huafei = 0.25 + (shijian - 3) * 0.15;
Label1.Text = huafei.ToString();
}
else
{
huafei = 0.25;
Label1.Text = huafei.ToString();
}
}
else if (RadioButton2.Checked)
{
if (TextBox1.Text == "")
{
Label1.Text = "请输入你的通话时间";
}
else
{
huafei = shijian * 0.35;
Label1.Text = huafei.ToString();
}
}
else if (RadioButton3.Checked)
{
if (TextBox1.Text == "")
{
Label1.Text = "请输入你的通话时间";
}
else
{
huafei = shijian * 1.10;
Label1.Text = huafei.ToString();
}
}
else
{
if (TextBox1.Text == "")
{
Label1.Text = "请输入你的通话时间" + "请选择你的通话类型";
}
else
{
Label1.Text = "请选择你的通话类型";
}
}
}
}
![clip_image020[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435821y770.jpg "clip_image020[1]")
![clip_image021[1]](http://img1.51cto.com/attachment/201005/21/1342062_12744358246L3p.jpg "clip_image021[1]")
![clip_image022[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435827zDEi.jpg "clip_image022[1]")
![clip_image023[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435831dMul.jpg "clip_image023[1]")
![clip_image024[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435833lvSP.jpg "clip_image024[1]")
![clip_image025[1]](http://img1.51cto.com/attachment/201005/21/1342062_1274435835b4nI.jpg "clip_image025[1]")