[英]Change data of one form from another form
My program is a testing. 我的程序是一个测试。 It contains some questions and some answers for them.
它包含一些问题和针对它们的一些答案。 I want to make it possible to add some questions.
我想添加一些问题。 I created a
MenuStrip
, where it opens another Form
, where I write new question and answers for them. 我创建了一个
MenuStrip
,在其中打开了另一个Form
,在其中为他们编写新的问题和答案。 I have su class to save questions in the main form: 我有su课以主要形式保存问题:
public class Question
{
public Question(string q_text, Dictionary<string, bool> ans)
{
text = q_text;
answers = ans;
isAnswered = false;
}
public string text { get; set; }
public Dictionary<string, bool> answers { get; set; }// = new Dictionary<RadioButton, bool>();
public bool isAnswered;
}
public Dictionary<int, Question> questions = new Dictionary<int, Question>();
I set them to public, but there are still some problems. 我将它们设置为公开,但是仍然存在一些问题。 It can't see existing questions in the Dictionary.
它在字典中看不到现有的问题。 This is a method that adds new question in other form:
这是一种以其他形式添加新问题的方法:
private void button1_Click(object sender, EventArgs e)
{
Form1 tmp = new Form1();
Dictionary<string,bool> ans = new Dictionary<string,bool>();
ans.Add(answer1.Text,checkBox1.Checked);
ans.Add(answer2.Text,checkBox2.Checked);
ans.Add(answer3.Text,checkBox3.Checked);
ans.Add(answer4.Text,checkBox4.Checked);
tmp.AddQuestion(textBox1.Text, ans);
}
Method in main form: 主要形式的方法:
public void AddQuestion(string text, Dictionary<string, bool> ans)
{
Question q = new Question(text, ans);
questions.Add(questions.Count + 1, q);
GroupBox gb = new GroupBox();
gb.Name = "GroupBox" + (questions.Count + 1);
gb.Size = new Size(500, 200);
gb.Location = new Point(40, loc);
gb.BackColor = System.Drawing.Color.Aquamarine;
Label q_text = new Label(); // текст питання
q_text.Text = text;
q_text.Font = new Font("Aria", 10, FontStyle.Bold);
q_text.Location = new Point(10, 10);
gb.Controls.Add(q_text);
int iter = q_text.Location.Y + 30;
if (CheckIfMuliple(questions.Count))
{
foreach (string key in ans.Keys)
{
CheckBox rb = new CheckBox();
rb.Text = key;
rb.Size = new Size(120, 25);
rb.Location = new Point(q_text.Location.X + 10, iter);
iter += 30;
gb.Controls.Add(rb);
}
}
else
{
foreach (string key in ans.Keys)
{
RadioButton rb = new RadioButton();
rb.Text = key;
rb.Size = new Size(120, 25);
rb.Location = new Point(q_text.Location.X + 10, iter);
iter += 30;
gb.Controls.Add(rb);
}
}
this.Controls.Add(gb);
}
What's a better way to implement adding new question to main form? 有什么更好的方法来实现在主表单中添加新问题?
First change your Form1 constructor Access modifier to private. 首先将您的Form1构造函数访问修饰符更改为private。
Then add this part of code in Form1 class: 然后将这部分代码添加到Form1类中:
private static Form1 _Instance;
public static Form1 Instance
{
get
{
if (_Instance == null)
_Instance = new Form1();
return _Instance;
}
}
Now you access all form1 member easily: 现在,您可以轻松访问所有form1成员:
Form1.Instance.AnyMember
This is a pattern called Singleton Pattern. 这是一个称为“单例模式”的模式。
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