I have usercontrol ctrlinserimento with a textbox and I have another usercontrol ctrlricerca with a botton that should set textbox.text in ctrlinserimento to a string(let's say for example 'Hello').
How can I do?
ctrlinserimento
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication3
{
public partial class ctrlinserimento : System.Web.UI.UserControl
{
public string textbox1
{
set { TextBox1.Text = value; }
get { return TextBox1.Text; }
}
}
}
ctrlricerca
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DevExpress.Web.ASPxGridView;
namespace WebApplication3
{
public partial class ctrlricerca: System.Web.UI.UserControl
{
public ctrlinserimento i
{
set; get;
}
protected void Button1_Click(object sender, EventArgs e)
{
i.textbox1 = "Hello";
}
}
}
}
I have NullReferenceException on
i.textbox1 = "Hello";
There are lot of way to do it i.e. page level, User control level. Check following solution that fit for you.
In ctrlricerca user control add property for ctrlinserimento and page level assign instance of ctrlinserimento to property of ctrlricerca
public partial class ctrlricerca: System.Web.UI.UserControl
{
private string nome;
public ctrlinserimento { set; }
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
ctrlinserimento.textbox.text="Hello";
}
}
}
}
Related
I am sorry if my question is silly , I am a beginner.I have two forms:
Form1: Displays a Table of Information
Form2: Displays a Form to Fill information
I need to get the information in Form2 to Form1 Using get methods (If there is a better way please suggest it).
My problem is that when I type those get methods in Form1 they are not recognized.
Form1
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 Form1 : Form
{
//---------------------------------Initial Stuff------------------------------------
Form2 form2 = null;
//----------------------------------Constructor-------------------------------------
public Form1()
{
InitializeComponent();
}
private void nouveau_Click(object sender, EventArgs e)
{
if (form2 == null)
{
form2 = new Form2();
form2.Show();
}
}
//---------------------------------ListView of Information------------------------------
ListViewItem lvi = new ListViewItem(getClient());
lvi.SubItems.Add(societe.Text);
lvi.SubItems.Add(datedebut.Text);
lvi.SubItems.Add(type.Text);
lvi.SubItems.Add(etat.Text);
}
}
Form2:
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 :
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
client.Text="";
societe.Text = "";
datedebut.Text = "";
type.Text = "";
etat.Text = "";
}
//----------------------------Return Functions for table----------------------
public String getClient()
{
return client.Text;
}
public String getSociete()
{
return societe.Text;
}
public String DateDebut()
{
return datedebut.Text;
}
public String getType()
{
return type.Text;
}
public String getEtat()
{
return etat.Text;
}
}
}
So I update my code and tried another way to do things
Now I have 4 .cs files: Principal, FillInfo, Folder, Program
Program:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Principal());
}
}
}
Folder:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace WindowsFormsApplication1
{
class Folder
{
//-----------------------------------------CONSTRUCTOR--------------------------
public Folder()
{
this.Customer = "";
this.Company = "";
this.StartDate = "";
this.TechUsed = "";
this.Status = "";
}
//-----------------------------------------GETTERS AND SETTERS-------------------
public string Customer { get; set; }
public string Company { get; set; }
public string StartDate { get; set; }
public string TechUsed { get; set; }
public string Status { get; set; }
}
}
Principal:
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 Principal : Form
{
//-----------------------------------INITIAL VARIABLES--------------------------------------------------
FillInfo fillinfo = null;
public Folder f;
//-----------------------------------INITIAL METHODS----------------------------------------------------
public Principal()
{
InitializeComponent();
}
//-----------------------------------ELEMENTS METHODS--------------------------------------------------
// NEW BUTTON
private void pNew_Click(object sender, EventArgs e)
{
f= new Folder();
if (fillinfo == null)
{
fillinfo = new FillInfo();
fillinfo.Show();
}
}
//---------------------------------------PROCESSING-----------------------------------------------------
ListViewItem fillInfoListView = new ListViewItem(f.getCustomer());
}
}
FillInfo:
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 FillInfo : Form
{
//-----------------------------------INITIAL VARIABLES--------------------------------------------------
//-----------------------------------INITIAL METHODS----------------------------------------------------
public FillInfo()
{
InitializeComponent();
}
//-----------------------------------ELEMENTS METHODS--------------------------------------------------
private void fOkButton_Click(object sender, EventArgs e)
{
f.setCustomer = fCustomerTextField.Text;
f.setCompany = fCompanyTextField.Text;
f.setStartDate = FStartDateDatePicker.Text;
f.setTechUsed = fTechUsedDropList.Text;
f.setStatus = fStatusDropList.Text;
fCustomerTextField.Text = "";
fCompanyTextField.Text = "";
FStartDateDatePicker.Text = "";
fTechUsedDropList.Text = "";
fStatusDropList.Text = "";
}
}
}
Assuming Form2 is something that appears and asks the user for info, then disappears when the user is done typing into it, it would probably look like:
private void nouveau_Click(object sender, EventArgs e)
{
var form2 = new Form2();
form2.ShowDialog(); //SHOW DIALOG
ListViewItem lvi = new ListViewItem(getClient());
lvi.SubItems.Add(form2.Societe); //the property you are busy writing
lvi.SubItems.Add(form2.DateDebut); //the property you are busy writing
lvi.SubItems.Add(form2.Type); //the property you are busy writing. Try and think of a more hepful name than Type
lvi.SubItems.Add(form2.Etat); //the property you are busy writing
//do you need to add that lvi to something?
}
Remove Form2 from being a class level variable
I have a web page called Default.aspx and a textbox called textBox1
In the Default.aspx.cs, I can set the text by typing:
TextBox1.text = "change text";
Now I have created another class. How do I call textBox1 in this class? so I want to change the text for textBox1 in this class.
So far i tried like this it is working fine in Mymethod but it is not working in Myclass.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Drawing;
using System.Threading;
namespace WebApplication1
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void submitEventMethod2(object sender, EventArgs e)
{
this.Mymethod();
}
public void mymethod1()
{
TextBox1.Text = "some text";
}
class Myclass
{
public void mymethod2()
{
TextBox1.Text = "some text";
}
}
}
}
I have a web page called Default.aspx and a textbox called textBox1
In the Default.aspx.cs, I can set the text by typing:
TextBox1.text = "change text";
Now I have created another class. How do I call textBox1 in this class? so I want to change the text for textBox1 in this class.
So far i tried like this it is working fine in Mymethod but it is not working in Myclass.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Drawing;
using System.Threading;
namespace WebApplication1
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void submitEventMethod2(object sender, EventArgs e)
{
this.Mymethod();
}
public void mymethod1()
{
Myclass myClass=new Myclass ();
myClass.mymethod2(TextBox1);
}
class Myclass
{
public void mymethod2(TextBox textBox)
{
textBox.Text = "some text";
}
}
}
}
Use Session[] for this.
e.g.
TextBox1.Text="abc";
Session["TextBox_Text"]=TextBox1.Text;
and in other class use this Session[] to assigning text to another TextBox by using,
TextBox2.Text=Session["TextBox_Text"].ToString();
Hope this will help you
Thank You.
You cannot access TextBox Text like this in class. You can access it like this as well:
class Myclass
{
private string _myText;
public string mystring
{
get
{
return _myText;
}
set
{
_myText = value;
}
}
}
public void Mymethod()
{
Myclass obj = new Myclass();
obj.mystring = TextBox1.Text.Trim();
//do what else you want
}
create another class
public class DataAccess
{
private string _value;
public string value
{
get
{
return this._value;
}
set
{
this._value = value.Trim();
}
}
}
use these code in your aspx.cs page and create object DataAccess
class. so you can access textbox value.
public partial class Default : System.Web.UI.Page
{
DataAccess objDaAccess = new DataAccess();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void submitEventMethod2(object sender, EventArgs e)
{
this.Mymethod();
}
public void Mymethod()
{
TextBox1.Text = "some text";
objDaAccess.value=TextBox1.Text;
}
class Myclass
{
TextBox1.Text = objDaAccess.value;
}
}
I have an int named "mode". I want to make every function be able to access it.
Here is my code.
namespace WindowsFormsApplication1
{
public partial class Form5 : Form
{
public Form5()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
int wow = mode - 1;
}
private void Form5_Load(object sender, EventArgs e)
{
int mode = 4;
}
}
}
Just make it a property of the class.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form5 : Form
{
public int mode {get; set;}
public Form5()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
int wow = mode - 1;
}
private void Form5_Load(object sender, EventArgs e)
{
mode = 4;
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form5 : Form
{
public int mode;
public Form5()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
int wow = mode - 1;
}
private void Form5_Load(object sender, EventArgs e)
{
mode = 4;
}
}
}
However, I'd be surprised if there wasn't a SO page about this. Also I'd recommend looking at MSDN and other programming c#.net resources.
I have 2 form, Form 1 and 2. Form 1 will be used to initialize Form 2. After Form 2 being initialize, Form 2 will be calling Form 1 method but it just won't work. I had been searching for hours but still no idea how it works. Please help me out.
Form 1
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 parentChildTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form2 x = new Form2();
x.Show();
}
public static void callMe(){
MessageBox.Show("HAHAHA");
}
}
}
Form 2
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 parentChildTest
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
/*How to call callMe()?????*/
}
}
}
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form1.Callme();
}
}
private void button1_Click(object sender, EventArgs e)
{
Form1.callMe();
}
Basically what I'm trying to do is I have a string on the main form that pulls its value from a textbox.
I then generate a modal version of a second form and want to have that string (or the main forms textbox1.text value) usable in the second form for processes.
Main Form
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;
using System.Diagnostics;
using System.IO;
namespace Tool{
public partial class MainForm : Form
{
public string hostname;
public MainForm()
{
InitializeComponent();
textBox1.Text = hostname;
}
public void btn_test_Click(object sender, EventArgs e)
{
string hostname = textBox1.Text;
SiteForm frmsite = new SiteForm();
frmsite.ShowDialog();
}
}
}
'
Child Form
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;
using System.Diagnostics;
using System.IO;
namespace Tool
{
public partial class SiteForm : Form
{
public string hostname {get; set; }
public SiteForm()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
label1.Text = this.hostname;
}
}
}
Any suggestions on how I can do this? I know there has to be a simpler way, sorry I'm still a bit of a noob and am trying to teach myself C# as I go.
The result is when I click the label on the child form it is blank, because of this I am able to deduce that the string isn't passing between the two forms correctly.
The simplest way is to pass it in the constructor of the Child form, for example:
private string _hostname = "";
...
public SiteForm(string hostname)
{
_hostname = hostname;
InitializeComponent();
}
Try hooking into your child form's Load event and set the value of its hostname property in an event handler on your main form.
public void btn_test_Click(object sender, EventArgs e)
{
string hostname = textBox1.Text;
SiteForm frmsite = new SiteForm();
frmsite.Load += new EventHandler(frmsite_Load);
frmsite.ShowDialog();
}
public void frmsite_Load(object sender, EventArgs e)
{
SiteForm frmsite = sender as SiteForm;
frmsite.hostname = this.hostname;
}