Good Day, I have a problem calling a method in other form. I have a code and the visual studio don't detect any error but my code did not run, I don't know why. Here's my code.
Form 1
private void btnenter_Click(object sender, EventArgs e)
{
Form1 f1 = new Form1();
f1.UpdateGridView();
}
Form 2
public void UpdateGridView()
{
//CODE HERE...
}
anybody can told what, where's the wrong of the code??
anybody can told what, where's the wrong of the code??
Your code creates a new instance of Form1. The code does not affect any existing instance of Form1.
The standard approach is moving shared code to a separate class file or class library that each forms can call. In this case, I assume you need an event and even handler. Form1 triggers an event and Form2 handles the event. Any parameters are passed as event arguments. See the C# programming guide.
Events overview (Windows Forms .NET)
Events (C# Programming Guide)
@JamieHayashi-3240, Welcome to Microsoft Q&A, you could try to use Application.OpenForms Property to get what you wanted.
Here is a code example you could refer to.
Form1:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form2 form = (Form2)Application.OpenForms["Form2"];
form.UpdateGridView();
}
private void Form1_Load(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.Show();
}
}
Form2:
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
public void UpdateGridView()
{
dataGridView1.Rows[1].Cells[1].Value = 23;
}
private void Form2_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("Name");
dt.Columns.Add("Age");
dt.Rows.Add("test1", 22);
dt.Rows.Add("test2", 32);
dt.Rows.Add("test3", 12);
dataGridView1.DataSource= dt;
}
}
Result:
Hope this could help you.
Best Regards,
Jack
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Think's Jack
I already fix this bug., Here my code.. Thank you so much.
//form1
private void Button1_Click(object sender, EventArgs e)
{
frm1FrontDesk_new frontdesk = new frm1FrontDesk_new(this);//for methods
frontdesk.Show();
}
public void ViewerGrid()//methods for viewer
{
try{con.open();
//code here
con.close();
}catch()
{
con.close();
}
}
//Note: in my pass code I forgot to put (this) to call this form.. sorry my mistake.. :)
//************************************
//form2
public partial class frm1FrontDesk_new : Form
{
public frm1FrontDesk_new(frm1FrontDesk frm1)//calling methods
{
InitializeComponent();
frm = frm1;
}
frm1FrontDesk frm = new frm1FrontDesk();
}
private void btnenter_Click(object sender, EventArgs e)
{
//code here//
frm.ViewerGrid();//for methods
this.Close();
}
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