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private void button16_Click(object sender,EventArgs e)

来源：学生作业帮 编辑：搜搜做题作业网作业帮 分类：综合作业 时间：2024/05/28 10:16:23
private void button16_Click(object sender,EventArgs e)
{
switch(s)
{
case"+":
b = Convert.ToDouble(textBox1); c = a + b; textBox1.Text = c.ToString();break;
case"-":
b = Convert.ToDouble(textBox1);c=a-b;textBox1.Text = c.ToString();break;
case"*":
b = Convert.ToDouble(textBox1);c=a*b;textBox1.Text = c.ToString();break;
case"/":
b = Convert.ToDouble(textBox1);c=a/b;textBox1.Text = c.ToString();break;
}
}
运行后说无法将类型为“System.Windows.Forms.TextBox”的对象强制转换为类型“System.IConvertible”.
private void button16_Click(object sender,EventArgs e)
= Convert.ToDouble(textBox1); c = a + b; textBox1.Text = c.ToString();break;
b = Convert.ToDouble(textBox1.Text); c = a + b; textBox1.Text = c.ToString();break;
private void button16_Click(object sender,EventArgs e) 英语翻译private void button1_Click(object sender,EventArgs e){if protected void Button2_Click(object sender,EventArgs e) {  protected void Button1_Click(object sender,EventArgs e VC++中object sender的用法 帮忙理解事件托管其中的object sender（事件发行者） 与keyEventArges e 的实际意义,与其作用 private void 和 private string 有什么区别 object private 英语翻译class Company //公司类{private:Person *Worker; //员工表void Cl #include class base { Private:int x,y; public:void setxy(int 1.给出如下代码：class Test{ private int m; public static void fun()