We Keep Coding

C# Convert all Rows of Databound datagridview to the databoundclass

I have a databound datagridview with the class Data
public class Data
{
public int itemId { get; set; }
public int minAmount { get; set; }
public int maxAmount { get; set; }
public decimal rate { get; set; }
public string rarity { get; set; }
public bool announce { get; set; }
}
Dictionary<string, Data[]> Dict = new Dictionary<string, Data[]>();
private void button1_Click(object sender, EventArgs e)
{
string readText = File.ReadAllText(#"D:\Download\npc_drops.json");
var result = JsonConvert.DeserializeObject<Dictionary<string, Data[]>>(readText);
foreach (KeyValuePair<string, Data[]> entry in result)
{
Data[] dat = (Data[])entry.Value;
string npc = entry.Key;
listBox1.Items.Add(npc);
Dict.Add(npc, dat);
}
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
BindingSource bs = (BindingSource)this.dataGridView1.DataSource;
this.dataGridView1.Rows.Clear();
string curItem = listBox1.SelectedItem.ToString();
Data[] data = Dict[curItem];
foreach (Data item in data)
{
bs.Add(item);
}
this.dataGridView1.DataSource = bs;
}
private void button2_Click(object sender, EventArgs e)
{
File.WriteAllText(#"D:\Download\npc_drops (1).json", string.Empty);
var result = JsonConvert.SerializeObject(Dict);
File.WriteAllText(#"D:\Download\npc_drops (1).json", result);
}
private void dataGridView1_RowStateChanged(object sender, DataGridViewRowStateChangedEventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
string curItem = listBox1.SelectedItem.ToString();
// I'm trying to get all the rows of datagridView1 and change the Dict's data of the currently selected item to the data of datagridview1
}
And basically i'm trying to get the rows from the datagridview into a Data array
aka Data[]
Using WinForms, I'm not using a database or anything I'm just deserializing json data and adding it to the datagridview

var bindingSource = (BindingSource)dataGridView1.DataSource;
BindingList<Data> list = new BindingList<Data>();
list = (BindingList < Data >)bindingSource.List;
Dict[curItem] = list.ToArray();
this solved my issue

You could do away with button3 altogether by changing the type of Dict to Dictionary<string, BindingList<Data>> and just updating dataGridView1.DataSource in listBox1_SelectedIndexChanged.
private Dictionary<string, BindingList<Data>> Dict = new Dictionary<string, BindingList<Data>>();
private void button1_Click(object sender, EventArgs e)
{
string readText = File.ReadAllText(#"D:\Download\npc_drops.json");
Dict = JsonConvert.DeserializeObject<Dictionary<string, BindingList<Data>>>(readText);
foreach (var npc in Dict.Keys)
{
listBox1.Items.Add(npc);
}
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string curItem = listBox1.SelectedItem.ToString();
dataGridView1.DataSource = Dict[curItem];
}
//button2_Click remains unchanged.
//button3 is removed from the form.

Change value in a list that is binded?

I'm pretty new at this. Using Windows Forms in Visual Studio. I am to hammer out a store that has clothes, with stock that can be transferred in or out of the store.
I've gotten as far as to having a class, a list that contains the clothes and their quantities, and I've managed to get them into comboboxes. What I want to do now is to be able to 'buy' new quantities, changing the value in the list.
I'm stumped as to how to change the actual quantities, I'm sure I am missing stuff here.
This is my class:
public class Store
{
public string Clothing { get; set; }
public int Quantity { get; set; }
public Store(string c, int q)
{
Clothing = c;
Quantity = q;
}
And this is my current code:
}
public partial class Form1 : Form
{
List<Store> stock = new List<Store>
{
new Store ("Jeans size S", 1),
new Store ("Jeans size M", 3),
new Store ("Jeans size L", 5)
};
public Form1()
{
InitializeComponent();
}
private void bShow_Click(object sender, EventArgs e)
{
cbStockType.ValueMember = "Clothing";
cbStockType.DisplayMember = "Clothing";
cbStockType.DataSource = stock;
cbStockQnt.ValueMember = "Quantity";
cbStockQnt.DisplayMember = "Quantity";
cbStockQnt.DataSource = stock;
}
private void lblHighlightAdd_Click(object sender, EventArgs e)
{
}
private void bSlctClothing_Click(object sender, EventArgs e)
{
if (cbStockType.SelectedIndex < 0)
{ lblHighlightAdd.Text = "None"; }
else
lblHighlightAdd.Text = cbStockType.SelectedValue.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
string quantityToAdd = tbQntAdd.Text;
int add = Convert.ToInt32(quantityToAdd);
string addToStock = cbStockQnt.SelectedValue.ToString();
int newAmount = Convert.ToInt32(addToStock);
int result = newAmount + add;
foreach (var item in stock)
{
if (item.Clothing == cbStockType.SelectedValue.ToString())
{
item.Quantity = item.Quantity + result;
MessageBox.Show(cbStockQnt.SelectedValue.ToString());
}
}
}
}
}
If you can read this spaghetti junk, I'm stuck at getting the quantity of the selected piece of clothing to change. How do I get it to change the value both in the list and in the combobox?

Selecting and displaying certain items from list based on specific property

i have a list of objects saved in a text file that I can display onto a form. However now I need a button that will only display certain objects from the list based on a property, in my case brand. Below is the code I've been trying to use but cant get it to work.
private void brandToolStripMenuItem_Click(object sender, EventArgs e)
{
List<Car> BrandSelect = new List<Car>(cars);
var SelectBrand = from c in BrandSelect
where c.Brand == textBox1.Text
select c;
DisplayCar();
}
Underneath is the full code, in case more information is needed, thanks for your help.
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;
using System.IO;
namespace Car_Manager
{
public partial class Form1 : Form
{
string currentfile;
Car c;
int curIndex = -1;
List<Car> cars = new List<Car>();
public Form1()
{
InitializeComponent();
c = new Car();
saveFileDialog1.CreatePrompt = true;
saveFileDialog1.OverwritePrompt = true;
saveFileDialog1.FileName = "myText";
saveFileDialog1.DefaultExt = "txt";
saveFileDialog1.Filter =
"Text files (*.txt)|*.txt|All files (*.*)|*.*";
}
public void clearForm()
{
txtBrand.Text = "";
txtModel.Text = "";
txtYear.Text = "";
txtPrice.Text = "";
txtNumMiles.Text = "";
txtInformation.Text = "";
radAutomatic.Checked = false;
radManual.Checked = false;
radConvertible.Checked = false;
radCoupe.Checked = false;
radEstate.Checked = false;
radHatchback.Checked = false;
radHPV.Checked = false;
radSaloon.Checked = false;
radSUV.Checked = false;
}
private void DisplayCar()
{
txtBrand.Text = c.Brand;
txtModel.Text = c.Model;
txtYear.Text = c.Year;
txtPrice.Text = c.Price;
txtNumMiles.Text = c.NumMiles;
DisplayBody();
DisplayGear();
string str = "";
for (int i = 0; i < c.Information.Count(); i++)
str += c.Information[i] + "\r\n";
txtInformation.Text = str;
}
private void FormToObject()
{
c.Brand = txtBrand.Text;
c.Model = txtModel.Text;
c.Year = txtYear.Text;
c.Price = txtPrice.Text;
c.NumMiles = txtNumMiles.Text;
BodyCheck();
GearCheck();
}
private void BodyCheck()
{
if (radHatchback.Checked == true)
{ c.Body = radHatchback.Text; }
else if (radHPV.Checked == true)
{ c.Body = radHPV.Text; }
else if (radSUV.Checked == true)
{ c.Body = radSUV.Text; }
else if (radSaloon.Checked == true)
{ c.Body = radSaloon.Text; }
else if (radConvertible.Checked == true)
{ c.Body = radConvertible.Text; }
else if (radCoupe.Checked == true)
{ c.Body = radCoupe.Text; }
else if (radEstate.Checked == true)
{ c.Body = radEstate.Text; }
}
private void DisplayBody()
{
if (c.Body == "Hatchback")
{ radHatchback.PerformClick(); }
else if (c.Body == "HPV")
{ radHPV.PerformClick(); }
else if (c.Body == "SUV")
{ radSUV.PerformClick(); }
else if (c.Body == "Convertible")
{ radConvertible.PerformClick(); }
else if (c.Body == "Saloon")
{ radSaloon.PerformClick(); }
else if (c.Body == "Coupe")
{ radSaloon.PerformClick(); }
else if (c.Body == "Estate")
{ radEstate.PerformClick(); }
}
private void GearCheck()
{
if (radAutomatic.Checked == true)
{ c.GearBox = radAutomatic.Text; }
else if (radManual.Checked == true)
{ c.GearBox = radManual.Text; }
}
private void DisplayGear()
{
if (c.GearBox == "Manual")
{ radManual.PerformClick(); }
else if (c.GearBox == "Automatic")
{ radAutomatic.PerformClick(); }
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
openFileDialog1.ShowDialog();
currentfile = openFileDialog1.FileName;
saveToolStripMenuItem.Enabled = true;
Stream s1 = openFileDialog1.OpenFile();
StreamReader reader = new StreamReader(s1);
while (reader.Peek() != -1)
{
string str = reader.ReadLine();
Car c = new Car();
c.ReadString(str);
cars.Add(c);
}
curIndex = 0;
c = cars[curIndex];
DisplayCar();
reader.Close();
}
private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
{
// Save everything in a dialog box
saveFileDialog1.ShowDialog();
// Open the file and save the information
Stream textOut = saveFileDialog1.OpenFile();
StreamWriter writer = new StreamWriter(textOut);
FormToObject();
string str = c.GetToString();
writer.WriteLine(str);
writer.Close();
}
private void saveToolStripMenuItem_Click(object sender, EventArgs e)
{
// Save the file with the current file name
FileStream f1 = new FileStream(currentfile, FileMode.Create, FileAccess.Write);
StreamWriter writer = new StreamWriter(f1);
// get the object into a string
FormToObject();
StreamWriter file = new System.IO.StreamWriter(f1);
cars.ForEach(file.WriteLine);
file.Close();
}
private void btnAddInfo_Click(object sender, EventArgs e)
{
c.Information.Add(txtAddInfo.Text);
string str = "";
for (int i = 0; i < c.Information.Count(); i++)
str += c.Information[i] + "\r\n";
txtInformation.Text = str;
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
private void btnClear_Click(object sender, EventArgs e)
{
txtInformation.Text = "";
}
private void addToolStripMenuItem_Click(object sender, EventArgs e)
{
}
private void btnPreviousCar_Click(object sender, EventArgs e)
{
curIndex--;
if (curIndex < 0)
curIndex = cars.Count - 1;
c = cars[curIndex];
DisplayCar();
}
private void btnNextCar_Click(object sender, EventArgs e)
{
curIndex++;
if (curIndex >= cars.Count)
curIndex = 0;
c = cars[curIndex];
DisplayCar();
}
private void button1_Click(object sender, EventArgs e)
{
int a = cars.Count;
textBox1.Text = Convert.ToString(cars[2]);
}
private void btnEditCar_Click(object sender, EventArgs e)
{
txtBrand.ReadOnly = false;
txtModel.ReadOnly = false;
txtYear.ReadOnly = false;
txtPrice.ReadOnly = false;
txtNumMiles.ReadOnly = false;
txtAddInfo.ReadOnly = false;
}
private void copyToolStripMenuItem_Click(object sender, EventArgs e)
{
}
private void brandToolStripMenuItem_Click(object sender, EventArgs e)
{
List<Car> BrandSelect = new List<Car>(cars);
var SelectBrand = from c in BrandSelect
where c.Brand == textBox1.Text
select c;
DisplayCar();
}
private void yearToolStripMenuItem1_Click(object sender, EventArgs e)
{
}
}
class Car
{
//List of properties
private string brand;
private string model;
private string year;
private string price;
private string numMiles;
private string body;
private string gearbox;
private List<string> information;
//Constructor
public Car() //Default Constructor
{
brand = "Unknown";
model = "Unknown";
year = "Unknown";
price = "Unknown";
numMiles = "Unknown";
information = new List<string>();
}
public Car(string str)
{
information = new List<string>();
ReadString(str);
}
public void ReadString(string str)
{
string[] words = str.Split('|');
int Nwords = words.Count();
brand = words[0];
model = words[1];
year = words[2];
price = words[3];
numMiles = words[4];
body = words[5];
gearbox = words[6];
information.Clear();
for (int i = 7; i < Nwords; i++)
information.Add(words[i]);
}
//Methods
public string Brand
{
get { return brand; }
set { brand = value; }
}
public string Model
{
get { return model; }
set { model = value; }
}
public string Year
{
get { return year; }
set { year = value; }
}
public string Price
{
get { return price; }
set { price = value; }
}
public string NumMiles
{
get { return numMiles; }
set { numMiles = value; }
}
public string Body
{
get { return body; }
set { body = value; }
}
public string GearBox
{
get { return gearbox; }
set { gearbox = value; }
}
public List<string> Information
{
get { return information; }
set { information = value; }
}
public string GetToString()
{
string str = "";
str += brand + "|";
str += model + "|";
str += year + "|";
str += price + "|";
str += numMiles + "|";
str += body + "|";
str += gearbox + "|";
for (int i = 0; i < information.Count(); i++)
str += information[i] + "|";
return str;
}
}
}

First thing that I noticed:
private void brandToolStripMenuItem_Click(object sender, EventArgs e)
{
// You already have list of cars, this line will copy your list
// into a new one, which is unnecessary work (you don't use it later).
// You don't need this:
List<Car> BrandSelect = new List<Car>(cars);
// the "c" here is not the "c" that is the field of your form
// it's a part of the syntax of linq query
var SelectBrand = from c in BrandSelect
where c.Brand == textBox1.Text
select c;
// This method displays what is in the field "c" (this.c)
// ... and the content of "c" didn't change at all
DisplayCar();
}
the code here should be, for example:
private void brandToolStripMenuItem_Click(object sender, EventArgs e)
{
//beware this can be null
this.c = (from a in this.cars
where a.Brand == textBox1.Text
select a).FirstOrDefault();
}
[msdn] introduction to linq queries

Remove and modify a selected item from listbox that uses datasource

I have a GUI that I am creating which reads a .csv file into a listbox and I am trying to remove a country that is selected when the application is running using a button. I have tried multiple codes however nothing works I either get a error message "Items collection cannot be modified when the DataSource property is set." or nothing happens. below is what I have at the moment. I am also trying to modify a selected item using textboxes.
namespace Countries
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private IList<tradingDetails> listOfCountries;
public class tradingDetails
{
public string Country { get; set; }
public string GDP { get; set; }
public string Inflation { get; set; }
public string TB { get; set; }
public string HDI { get; set; }
public string TP { get; set; }
public string Display
{
get
{
return string.Format("Country = {0} --- GDP = {1} --- Inflation = {2} --- TB = {3} --- HDI = {4} --- TP = {5}", this.Country, this.GDP, this.Inflation, this.TB, this.HDI, this.TP);
}
}
}
public static string[] headers { get; set; }
public void load_Click(object sender, EventArgs e)
{
this.listOfCountries = new List<tradingDetails>();
this.listBox1.ValueMember = "Countries";
this.listBox1.DisplayMember = "Display";
this.InsertInfo();
this.listBox1.DataSource = this.listOfCountries;
}
public void InsertInfo()
{
OpenFileDialog browse = new OpenFileDialog();
browse.Multiselect = true;
if (browse.ShowDialog() == DialogResult.OK)
{
string selectedFile = browse.FileName;
const int MAX_SIZE = 5000;
string[] AllLines = new string[MAX_SIZE];
AllLines = File.ReadAllLines(selectedFile);
foreach (string line in AllLines)
{
if (line.StartsWith("Country"))
{
headers = line.Split(',');
}
else
{
string[] columns = line.Split(',');
tradingDetails fileCountry = new tradingDetails
{
Country = columns[0],
GDP = columns[1],
Inflation = columns[2],
TB = columns[3],
HDI = columns[4],
TP = columns[5]
};
this.listOfCountries.Add(fileCountry);
}
}
}
}
private void DataBind()
{
listBox1.BeginUpdate();
listBox1.DataSource = listOfCountries;
listBox1.EndUpdate();
}
private void remove_Click(object sender, EventArgs e)
{
for (int x = listBox1.SelectedIndices.Count - 1; x >= 0; x--)
{
int idx = listBox1.SelectedIndices[x];
listBox1.Items.RemoveAt(idx);
}
}
private void search_Click(object sender, EventArgs e)
{
listBox1.SelectedItems.Clear();
for (int i = 0; i < listBox1.Items.Count; i++)
{
if (listBox1.Items[i].ToString().Contains(textBox1.Text))
{
listBox1.SetSelected(i, true);
}
}
}
private void button2_Click(object sender, EventArgs e)
{
textBox2.Text = listBox1.Items.Count.ToString();
}
}
}
UPDATE
I have tried this however this deletes all the information in the combo box and not an individual item.
private void remove_Click(object sender, EventArgs e)
{
comboBox1.DataSource = null;
comboBox1.Items.Remove(comboBox1.SelectedValue);
comboBox1.DataSource = listOfCountries;
}

You can't remove items from listbox while it's bounded with a source. For a better understanding, you are trying to remove the item, that your listbox is not an owner of, but the source is(that you have set the datasource of listbox).
Instead, you need to remove the item from the datasource itself.
private void remove_Click(object sender, EventArgs e)
{
for (int x = listBox1.SelectedIndices.Count - 1; x >= 0; x--)
{
int idx = listBox1.SelectedIndices[x];
//listBox1.Items.RemoveAt(idx);
listOfCountries.RemoveAt(idx)l
}
listBox1.RefreshItems();
}
Also, as you are trying to clear all the items from your listbox, this not a good approach to iterate every items and remove all. Instead, you should either clear your listOfCountries or set the listbox1datasource as null.

C# how to load listview

im doing a windows form application to open and load a database. the code needs to show single record view of the records and the listView view however i am stuck on the listVIew part.
here is the following code
using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ADOX;
namespace Ex3
{
public partial class changeButton : Form
{
public List<Client> ClientRecords = new List<Client>(); //Creates a list for the records to be stored
public string filename;
public string fileDir;
public string rec;
public bool checkBC;
public bool checkLC;
public string dataBaseFile;
public OleDbConnection conn;
public changeButton()
{
InitializeComponent();
}
int position = 0;
private void Form1_Load(object sender, EventArgs e)
{
credBalBox.Maximum = 9999999999;
savingBalBox.Maximum = 9999999999;
}
private void ConnectToDataBase()
{
try
{
string strConn = #"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" +
dataBaseFile + ";";
conn = new OleDbConnection(strConn);
conn.Open();
}
catch (OleDbException e)
{
MessageBox.Show("Failed to connect to database: " + e.Message);
}
}
private void nextButton_Click(object sender, EventArgs e)
{
if (position < ClientRecords.Count - 1)
{
position++;
Print();
}
else
{
MessageBox.Show("Outside of the record limit");
}
}
private void previousButton_Click(object sender, EventArgs e)
{
if (position > 0)
{
position--;
Print();
}
else
{
MessageBox.Show("Outside of the record limit");
}
}
public void Print()
{
int positionAdd1;
positionAdd1 = position;
positionAdd1++;
currentRecLab.Text = positionAdd1.ToString();
MaxRecLab.Text = ClientRecords.Count.ToString();
if (position >= 0 && position < ClientRecords.Count)
{
nameBox.Text = ClientRecords[position].Name;
suburbBox.Text = ClientRecords[position].Suburb;
postBox.Text = ClientRecords[position].Postcode;
credBalBox.Text = ClientRecords[position].CreditBal.ToString();
savingBalBox.Text = ClientRecords[position].SavingBal.ToString();
}
else
{
nameBox.Text = "";
suburbBox.Text = "";
postBox.Text = "";
credBalBox.Text = "";
savingBalBox.Text = "";
}
}
private void addButton_Click(object sender, EventArgs e)
{
string sameAddName = "null";
string addName;
string addSuburb;
string addPostcode;
decimal addCredBal;
decimal addSavBal;
addName = nameBox.Text;
addSuburb = suburbBox.Text;
addPostcode = postBox.Text;
addCredBal = decimal.Parse(credBalBox.Text);
addSavBal = decimal.Parse(savingBalBox.Text);
string sqlPrefix = "INSERT INTO Client VALUES ";
string data = "(" + "'" + addName + "','" + addSuburb + "','" + addPostcode + "','" + addCredBal + "','" + addSavBal + "'" + ")";
string sql = sqlPrefix + data;
foreach (Client client in ClientRecords)
{
if (addName == client.Name)
{
sameAddName = "Name is not unique. Please use a unique name";
}
}
if (sameAddName == "null" && addSuburb != null)
{
ClientRecords.Add(new Client(addName, addSuburb, addPostcode, addCredBal, addSavBal));
OleDbCommand cmd = new OleDbCommand(sql, conn);
cmd.ExecuteNonQuery();
int positions = ClientRecords.Count;
currentRecLab.Text = positions.ToString();
MaxRecLab.Text = positions.ToString();
nameBox.Text = addName;
suburbBox.Text = addSuburb;
postBox.Text = addPostcode;
credBalBox.Text = addCredBal.ToString();
savingBalBox.Text = addSavBal.ToString();
position = ClientRecords.Count - 1;
}
else
{
if ((sameAddName != "null") && (addSuburb == "") && (addPostcode == ""))
{
MessageBox.Show(sameAddName + "\nAlso, one of the fields are empty. Please fill it in before adding a new record");
}
else if (sameAddName != "null")
{
MessageBox.Show(sameAddName);
}
}
}
private void removeButton_Click(object sender, EventArgs e)
{
int recPosition = int.Parse(currentRecLab.Text);
recPosition = recPosition - 1;
position = 0;
ClientRecords.Remove(ClientRecords[recPosition]);
Print();
if (MaxRecLab.Text == "0")
{
currentRecLab.Text = "0";
}
}
private void loadButton_Click_1(object sender, EventArgs e)
{
OleDbCommand cmd = new OleDbCommand ("SELECT * FROM Client", conn);
using (OleDbDataReader rdr = cmd.ExecuteReader())
{
while (rdr.Read())
{
Client nClient = new Client(rdr[0].ToString(), rdr[1].ToString(), rdr[2].ToString(), decimal.Parse(rdr[3].ToString()), decimal.Parse(rdr[4].ToString()));
ClientRecords.Add(nClient);
Print();
}
}
}
private void connectButton_Click(object sender, EventArgs e)
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Title = "Select DataBase";
if (dialog.ShowDialog() == DialogResult.OK)
{
dataBaseFile = dialog.FileName;
DatabaseNameBox.Text = dataBaseFile;
ConnectToDataBase();
}
}
private void DatabaseNameBox_TextChanged(object sender, EventArgs e)
{
}
private void label7_Click(object sender, EventArgs e)
{
}
private void nameBox_TextChanged(object sender, EventArgs e)
{
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
public class Client
{
protected string name;
protected string suburb;
protected string postcode;
protected decimal creditBal;
protected decimal savingBal;
public Client(string name, string suburb, string postcode, decimal creditBal, decimal savingBal)
{
this.name = name;
this.suburb = suburb;
this.postcode = postcode;
this.creditBal = creditBal;
this.savingBal = savingBal;
}
public string Name
{
get
{
return name;
}
set
{
name = value;
}
}
public string Suburb
{
get
{
return suburb;
}
set
{
suburb = value;
}
}
public string Postcode
{
get
{
return postcode;
}
set
{
postcode = value;
}
}
public decimal CreditBal
{
get
{
return creditBal;
}
set
{
creditBal = value;
}
}
public decimal SavingBal
{
get
{
return savingBal;
}
set
{
savingBal = value;
}
}
}
}
thanks in advance
further info
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
i want to be able to put the code here and when i click the load button from above it should load the listview

To load a listview I would use the following function - it uses a array of string and listviewitem do add items to a listview.
private void LoadListview()
{
string NAME = "John DOE";
string AGE = "30";
string SEX = "MALE";
string DOB = "08/28/1988";
string[] rowa = { NAME, AGE, SEX, DOB };
var listViewItema = new ListViewItem(rowa);
listView1.Items.Add(listViewItema);
listView1.Items.Add(listViewItema);
listView1.Items.Add(listViewItema);
listView1.Items.Add(listViewItema);
}
You can find a step by step detail answer on my website: http://softvernow.com/2018/05/01/create-list-of-objects-and-load-listview-using-c/