从另一个表单访问表单数据

本文介绍了从另一个表单访问表单数据的处理方法，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

给出下面的代码，我将如何访问Form2中的listBox1?我确定我缺少愚蠢！在此先感谢."

"Give the code below, how would I access the listBox1 in Form2? I'm sure I'm missing stupid! Thanks in advance."

由于无法访问错误1'WindowsFormsApplication1.Form2.listBox1' 对其保护 C级:\ Users \ dugaj0 \ Desktop \ Developing \ GlobalUser \ WindowsFormsApplication1 \ WindowsFormsApplication1 \ Form1.cs 24 19 WindowsFormsApplication1

Error 1 'WindowsFormsApplication1.Form2.listBox1' is inaccessible due to its protection level C:\Users\dugaj0\Desktop\Developing\GlobalUser\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs 24 19 WindowsFormsApplication1

using System; using System.IO; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { String value1 = File.ReadAllText(textBox1.Text); foreach (string line in value1.Split('\n')); Form2.listBox1.Items.Add(); } } } 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 WindowsFormsApplication1 { public partial class Form2 : Form { public Form2() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Application.Exit(); } } } namespace WindowsFormsApplication1 { partial class Form2 { /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// Clean up any resources being used. /// </summary> /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.listBox1 = new System.Windows.Forms.ListBox(); this.button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // listBox1 // this.listBox1.FormattingEnabled = true; this.listBox1.Location = new System.Drawing.Point(13, 13); this.listBox1.Name = "listBox1"; this.listBox1.Size = new System.Drawing.Size(259, 212); this.listBox1.TabIndex = 0; // // button1 // this.button1.Location = new System.Drawing.Point(105, 231); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 1; this.button1.Text = "Exit"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // Form2 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(284, 262); this.Controls.Add(this.button1); this.Controls.Add(this.listBox1); this.Name = "Form2"; this.Text = "Form2"; this.ResumeLayout(false); } #endregion private System.Windows.Forms.ListBox listBox1; private System.Windows.Forms.Button button1; } }

推荐答案

首先，您必须创建Form2的实例.

First of all you have to create an instance of Form2.

namespace WindowsFormsApplication1 { public partial class Form1 : Form { private Form2 form2; public Form1() { InitializeComponent(); form2 = new Form2(); } private void button1_Click(object sender, EventArgs e) { String value1 = File.ReadAllText(textBox1.Text); foreach (string line in value1.Split('\n')) { form2.listBox1.Items.Add(line); } } }

}

您的特定错误是由于listBox1是私有的.将其更改为公开，您可以访问它.

Your specific error is because of listBox1 is being private. Change it to public and you can access it.

public System.Windows.Forms.ListBox listBox1;

还因为您已经拥有:

using System.Windows.Forms;

你可以写

public ListBox listBox1;