C＃将数据从form2传递给开始form1 [英] C# passing data from form2 to opening form1

问题描述

伙计们帮助我解决这个问题
我有两个表单Form1包含四个ComboBox，Form2包含一个ComboBox和一个带三列的Datagridview。 
 
当我在Form1中鼠标点击 One ComboBox 时，它会显示Form1并填充来自 ComboBox 的 ComboBox （Form1）并填写与 ComboBox （Form2）相关的 DataGridView 信息。因此，当我单击 DataGridView 中的一行（在Form2中）时，该行中的数据将传递给Form1中的其他三个ComboBox 。 
 
当我在（Form1）中鼠标点击 ComboBox 时，它将数据传递到（Form2）中的ComboBox并在DataGridview中显示与（Form2）中的ComboBox相关的行，正确。但是，当我在一行上鼠标单击时，它不会将它从（Form2）中的DataGridView传递到（Form1）中的三个ComboBox。 
 
请，我需要你的帮助。

我的尝试：

这是Form1。 
显示Form2并将数据传递给ComboBox（Form1）
 
< pre> private void ComboBox1_MouseClick（对象发送者，MouseEventArgs e）
 {
 Form2 f2 = new Form2 （this.ComboBox.Text）; 
 f2.MdiParent = this.MdiParent; 
 f2.Show（）; 
} 

此函数它将数据从DataGridView（Form2）返回到Form1

 public Form1（字符串Data1，字符串Data2，字符串Data3）
 {
 InitializeComponent（）; 
 this.ComboBox1.Text = Data1; 
 this.ComboBox2.Text = Data2; 
 this.ComboBox3.Text = Data3 
 this.ActiveControl = this.ComboBox1; 
} 

============================== =========

在表格2中，这是代码：

从Form1获取数据

 public Form2（string Data1）
 {
 InitializeComponent（）; 
 this.ComboBox.Text = Data1; 
} 

这是我向Form1发送数据的时候

 private void DataGridView1_CellMouseClick（object sender，DataGridViewCellMouseEventArgs e）
 {
 Form1 F1 = new Form1（this.DataGridView1.CurrentRow.Cells [0] .Value.ToString（），
 this.DataGridView1。 CurrentRow.Cells [1] .Value.ToString（），this.DataGridView1.CurrentRow.Cells [2] .Value.ToString（），
} 

解决方案

你一直在创造新的实例 - 这根本不是你需要做的事情。

见这里：在两种表格之间转移信息，第2部分：从孩子到父母 [ ^ ]



另外两个也可能有用：

在两种表格之间转移信息，第1部分：父母对孩子 [ ^ ]

在两种表格之间传递信息，第3部分：儿童与儿童 [ ^ ]

Guys help me with this problem
I have two form Form1 contains Four ComboBox and Form2 contain one ComboBox and one Datagridview with three column.

When I mouseclick on One ComboBox in Form1 it displays Form1 and fill ComboBox that come from ComboBox (Form1) and fill DataGridView info that related to that ComboBox(Form2). So, When I click on one row in DataGridView (in Form2), the data from that row it passing to other three ComboBox in Form1.

When I do mouseclick on ComboBox in (Form1) it passing data to ComboBox in (Form2) and display the rows in DataGridview that related to ComboBox in (Form2), correctly. However, When I mouseclick on one row it does not pass that from DataGridView in (Form2) to three ComboBox in (Form1).

Please, I need your help.

What I have tried:

This is in Form1.
Display Form2 and Pass data to ComboBox (Form1)

<pre>private void ComboBox1_MouseClick(object sender, MouseEventArgs e)
        {
            Form2 f2 = new Form2(this.ComboBox.Text);
            f2.MdiParent = this.MdiParent;
            f2.Show();
        }

this Function it return the Data from DataGridView (Form2) to Form1

public Form1(string Data1, string Data2, string Data3)
        {
            InitializeComponent();
            this.ComboBox1.Text = Data1;
            this.ComboBox2.Text = Data2;
            this.ComboBox3.Text = Data3
            this.ActiveControl = this.ComboBox1;
        }

=======================================
In Form 2 this is Code:
Get data from Form1

public Form2(string Data1)
        {
            InitializeComponent();
            this.ComboBox.Text = Data1;
        }

This is when I send data to Form1

private void DataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            Form1 F1 = new Form1(this.DataGridView1.CurrentRow.Cells[0].Value.ToString(),
                this.DataGridView1.CurrentRow.Cells[1].Value.ToString(), this.DataGridView1.CurrentRow.Cells[2].Value.ToString(),
        }

解决方案

You are creating new instances all the time - that's not what you need to do at all.
See here: Transferring information between two forms, Part 2: Child to Parent[^]

The other two may be of use as well:
Transferring information between two forms, Part 1: Parent to Child[^]
Transferring information between two forms, Part 3: Child to Child[^]

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