UC知道C# WINDOW程序问题！
来源：百度知道 编辑：UC知道 时间：2024/05/29 05:17:16
这是一个计算器，输入2个数，然后计算
怎样实现如果没有输入，或只输入1个数，弹出提示并返回让用户输入
sing System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication2
{
public partial class jeadong : Form
{
public jeadong()
{
InitializeComponent();
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void btnprint_Click(object sender, EventArgs e)
{
int n = int.Parse(txtRow.Text);
int j = int.Parse(txtcheng.Text);
int s = n * j;
txtPic.Text = s.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
double n=double.Pa
怎样实现如果没有输入，或只输入1个数，弹出提示并返回让用户输入
sing System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication2
{
public partial class jeadong : Form
{
public jeadong()
{
InitializeComponent();
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void btnprint_Click(object sender, EventArgs e)
{
int n = int.Parse(txtRow.Text);
int j = int.Parse(txtcheng.Text);
int s = n * j;
txtPic.Text = s.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
double n=double.Pa
if（text1.text=""||text2.text=""）
messagebox("警告！")；
text1.focus();
if (txtRow.Text.Length==0 || txtcheng.Text.Length == 0)
{
MessageBox.Show("输入信息不完整,请重新输入");
}