如何将组合框项从一种形式添加到另一种形式的组合框中 [英] How to add combobox item from one form to another form combobox

问题描述

我有1个主要形式，我有一个名为Select Treatment的组合框没有任何项目，即它是空的，下面有一个名为Start new treatment的按钮。在按钮上单击，将出现一个新表单，在该表单中，我有一个组合框，其中包含一些项目和一个保存按钮。问题是当我点击保存按钮时，组合框中的所选项目必须转移到主表单组合框。我该怎么办 ？请帮助！



我尝试过：



开始新的治疗主表单代码上的按钮：



public void button1_Click（object sender，EventArgs e）

{

Form2 f2 = new Form2（）;

f2。显示（）;

}



点击按钮点击新表单中出现带有一些项目的组合框和一个保存按钮。

保存按钮代码：



private void button1_Click（object sender，EventArgs e）

{

TreatmentInformation tn = new TreatmentInformation（）;

tn.comboBox2.Items.Add（comboBox1.SelectedItem）;



}

解决方案

这是针对您的问题的两种解决方案。

-1 -Sol 1：为所有非主表单添加parentForm引用。

=>当您创建新表单时，您将初始化您的Parentform支柱：

 Form2 f2 =  new  Form2（） ; 
 f2.ParentForm = myParentForm; 
 f2。显示（）; 

当您要使用f2_Closing事件关闭Form2时，您将调用填充Combobox的父方法。

-2-Sol 2：在主表单中订阅f2_closing事件：

 Form2 f2 = new Form2（）; 
 f2.FormClosed + = new FormClosedEventHandler（f2_Closed）; 

当form2关闭时，

 f2_Closed 

将执行事件，您可以初始化组合框。

在 Program.cs 中创建一个公共变量，例如 comboVar ：

 public static class Program 
 {
 public static string comboVar; 
 

并在您的表格中访问它：

 tn.comboBox2.Items.Add（ Program.comboVar）; 

I have 1 main form in that form i have one combobox named Select Treatment with no items in it i.e it is empty and below there is a button named Start new treatment. On button click a new form appears and in that form i have one combobox with some items in it and a save button. the problem is when i clicked the save button the selected item from combobox must transfer to the main form combobox . how do i do ? please help !

What I have tried:

Start new treatment Button on Main form code:

public void button1_Click(object sender, EventArgs e)
{
Form2 f2 = new Form2();
f2 .Show ();
}

On button click new form appears with combobox with some items in it and a save button.
Save Button Code:

private void button1_Click(object sender, EventArgs e)
{
TreatmentInformation tn = new TreatmentInformation();
tn.comboBox2.Items.Add (comboBox1.SelectedItem);

}

解决方案

Here is 2 solutions for your problem.
-1-Sol 1 : Add a parentForm refernce for all non main form.
=> when you create a new form, you init your Parentform prop :

Form2 f2 = new Form2();
f2.ParentForm = myParentForm;
f2 .Show ();

When you are about to close the Form2 using f2_Closing event, you call your parent method that fills the Combobox.
-2-Sol 2 : Subscribe to f2_closing event in your main form:

Form2 f2 = new Form2(); 
f2.FormClosed += new FormClosedEventHandler(f2_Closed);

When the form2 is closed the

f2_Closed

event will be executed and you can init your combobox.

In Program.cs create a public variable e.g. comboVar:

public static class Program
{
    public static string comboVar;

And access it in your forms like this:

tn.comboBox2.Items.Add (Program.comboVar);

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