Re: [問題] 將文字方塊讀入的文字暫存

看板C_Sharp作者mrgyt1030 (Young)時間16年前 (2010/04/10 12:56)推噓2(2推 0噓 4→)

留言6則, 3人參與討論串2/2 (看更多)

看了推文嘗試寫出了以下程式碼: public void Sum_Click(object sender, EventArgs e) { string str = Console.ReadLine(); int str1 = int.Parse(str); textBox1.Text = ""; } 編譯可以過但是執行的時候數字按完按"+"的時候會出現一個警告視窗 ArgumentNullException未處理請問這要怎麼解決? 附上完整程式碼: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace computer1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void num0_Click(object sender, EventArgs e) { textBox1.Text += "0"; } private void num1_Click(object sender, EventArgs e) { textBox1.Text += "1"; } private void num2_Click(object sender, EventArgs e) { textBox1.Text += "2"; } private void num3_Click(object sender, EventArgs e) { textBox1.Text += "3"; } private void num4_Click(object sender, EventArgs e) { textBox1.Text += "4"; } private void num5_Click(object sender, EventArgs e) { textBox1.Text += "5"; } private void num6_Click(object sender, EventArgs e) { textBox1.Text += "6"; } private void num7_Click(object sender, EventArgs e) { textBox1.Text += "7"; } private void num8_Click(object sender, EventArgs e) { textBox1.Text += "8"; } private void num9_Click(object sender, EventArgs e) { textBox1.Text += "9"; } private void point_Click(object sender, EventArgs e) { textBox1.Text += "."; } public void Sum_Click(object sender, EventArgs e) { string str = Console.ReadLine(); int str1 = int.Parse(str); textBox1.Text = ""; } } } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 125.224.121.11

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james732

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