算术运算结果不以标签显示

本文介绍了算术运算结果不以标签显示的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

protected void RadioButton2_CheckedChanged（对象发​​件人，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（ textbox2.Text）; no2 = Convert.ToInt32（ textbox3.Text）; ans = no1 - no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton1_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（ textbox2.Text）; no2 = Convert.ToInt32（ textbox3.Text）; ans = no1 + no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton3_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（ textbox2.Text）; no2 = Convert.ToInt32（ textbox3.Text）; ans = no1 * no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton4_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt16（ textbox2.Text）; no2 = Convert.ToInt16（ textbox3.Text）; ans = no1 / no2; Label2.Text = ans.ToString（）; }

解决方案

我不知道为什么，但你试图将文本textbox1.Text转换为一个整数，而不是文本框中的值：

protected void RadioButton2_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（textbox2.Text）; // 这就是问题所在的问题 no2 = Convert.ToInt32（textbox3.Text ）; // 所有带引号的线 ans = no1 - no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton1_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（textbox2.Text）; no2 = Convert.ToInt32（textbox3.Text）; ans = no1 + no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton3_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt32（textbox2.Text）; no2 = Convert.ToInt32（textbox3.Text）; ans = no1 * no2; Label2.Text = ans.ToString（）; } 受保护 void RadioButton4_CheckedChanged（ object sender，EventArgs e） { int no1，no2; float ans; no1 = Convert.ToInt16（textbox2.Text）; no2 = Convert.ToInt16（textbox3.Text）; ans = no1 / no2; Label2.Text = ans.ToString（）; }

在进行转换时取消引号;） 替换它

Convert.ToInt32（ textbox2.Text ）;

有了这个

Convert.ToInt32（textbox2.Text）;

protected void RadioButton2_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32("textbox2.Text"); no2 = Convert.ToInt32("textbox3.Text"); ans = no1 - no2; Label2.Text = ans.ToString(); } protected void RadioButton1_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32("textbox2.Text"); no2 = Convert.ToInt32("textbox3.Text"); ans = no1 + no2; Label2.Text = ans.ToString(); } protected void RadioButton3_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32("textbox2.Text"); no2 = Convert.ToInt32("textbox3.Text"); ans = no1 * no2; Label2.Text = ans.ToString(); } protected void RadioButton4_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt16("textbox2.Text"); no2 = Convert.ToInt16("textbox3.Text"); ans = no1 /no2; Label2.Text =ans.ToString(); }

解决方案

I don't know why, but you are trying to convert the text "textbox1.Text" to an integer, not the value in the textbox:

protected void RadioButton2_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32(textbox2.Text); //THIS IS WHERE THE PROBLEM WAS ON no2 = Convert.ToInt32(textbox3.Text); //ALL THESE LINES WITH QUOTES ans = no1 - no2; Label2.Text = ans.ToString(); } protected void RadioButton1_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32(textbox2.Text); no2 = Convert.ToInt32(textbox3.Text); ans = no1 + no2; Label2.Text = ans.ToString(); } protected void RadioButton3_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt32(textbox2.Text); no2 = Convert.ToInt32(textbox3.Text); ans = no1 * no2; Label2.Text = ans.ToString(); } protected void RadioButton4_CheckedChanged(object sender, EventArgs e) { int no1, no2; float ans; no1 = Convert.ToInt16(textbox2.Text); no2 = Convert.ToInt16(textbox3.Text); ans = no1 /no2; Label2.Text =ans.ToString(); }

Suppress the quotes when you're doing conversions ;) Replace this

Convert.ToInt32("textbox2.Text");

With that

Convert.ToInt32(textbox2.Text);