Ошибка сетки данных C#: «System.IndexOutOfRangeException: 'Индекс -1 не имеет значения'» [дубликат] ⇐ C#

[Anonymous]

Я хочу щелкнуть представление сетки данных формы и отобразить данные из строки обратно в форму. Я получаю следующую ошибку: System.IndexOutOfRangeException: «Индекс -1 не имеет значения».
Я новичок в C#, без опыта... Есть идеи, как это решить?

Код: Выделить всё

using System;
using System.Windows.Forms;

namespace Proiect_PAW
{
internal class Program
{
static void Main(string[] args)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);

// Setam Interfata ca form principal
Application.Run(new Interfata());
}
}
}

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace Proiect_PAW
{
public partial class Interfata : Form
{
// Lista care stocheaza toate conturile
public List conturi = new List();

public Interfata()
{
Console.WriteLine("2");
InitializeComponent(); // Initializam componentele de pe formular
Console.WriteLine("3");
RefreshGrid(); // Metoda pentru actualizarea tabelei cu conturi
}

private void btnCreareCont_Click(object sender, EventArgs e)
{
Console.WriteLine("4");
// Preluarea datelor din formular
string nume = numeCont.Text;
decimal soldInitialValue = soldInitial.Value;
decimal soldCurentValue = soldCurent.Value;

// Creem un cont nou
Cont cont = new Cont(conturi.Count + 1, nume, soldInitialValue, soldCurentValue);

// Adăugam contul în lista de conturi
conturi.Add(cont);

// Actualizam tabelei
RefreshGrid();

// Golim text box-urile de informatii
numeCont.Text = String.Empty;
soldInitial.Value = 0;
soldCurent.Value = 0;
}

private void btnActualizareCont_Click(object sender, EventArgs e)
{
if (dataGridViewConturi.SelectedRows.Count > 0)
{
// Obținem indexului rândului selectat
int index = dataGridViewConturi.SelectedRows[0].Index;

// Verificam daca indexul este valid
if (index >= 0 && index < conturi.Count)
{
// Actualizam datele contului
conturi[index].NumeCont = numeCont.Text;
conturi[index].SoldInitial = soldInitial.Value;
conturi[index].SoldCurent = soldInitial.Value;

// Actualizam tabelul
RefreshGrid();
}

// Actualizam tabelul
RefreshGrid();
}
}

private void btnStergeCont_Click(object sender, EventArgs e)
{
if (dataGridViewConturi.SelectedRows.Count >  0)
{
// Obținem indexului rândului contului selectat
int index = dataGridViewConturi.SelectedRows[0].Index;

// Ștergem contul din lista
conturi.RemoveAt(index);

// Actualizam tabelul
RefreshGrid();
}
}

// Metoda utilizata pentru actualizarea tabelei cu conturi din formular
private void RefreshGrid()
{
Console.WriteLine("5");
// Resetăm sursa de date
dataGridViewConturi.DataSource = null;
// Apoi o resetăm cu cele mai noi date (cu lista actualizată)
dataGridViewConturi.DataSource = conturi;

// Asigură-te că numele coloanelor sunt setate corect
if (dataGridViewConturi.Columns["NumeCont"] == null)
{
dataGridViewConturi.Columns.Add("NumeCont", "Nume Cont");
}
if (dataGridViewConturi.Columns["SoldInitial"] == null)
{
dataGridViewConturi.Columns.Add("SoldInitial", "Sold Initial");
}
if (dataGridViewConturi.Columns["SoldCurent"] == null)
{
dataGridViewConturi.Columns.Add("SoldCurent", "Sold Curent");
}
}

// Metoda utilizata pentru afisarea datelor inapoi in formular cand utilizatorul apasa pe un cont
private void dataGridViewConturi_CellClick(object sender, DataGridViewCellEventArgs e)
{
Console.WriteLine("6");
try
{
Console.WriteLine(sender);
Console.WriteLine(e);
if (e.RowIndex >= 0)
{
DataGridViewRow row = dataGridViewConturi.Rows[e.RowIndex];
numeCont.Text = row.Cells["NumeCont"].Value.ToString();
soldInitial.Value = Convert.ToDecimal(row.Cells["SoldInitial"].Value);
soldCurent.Value = Convert.ToDecimal(row.Cells["SoldCurent"].Value);
}
}
catch (Exception ex)
{
MessageBox.Show($"An error occurred: {ex.Message}");
}
}
}
}

namespace Proiect_PAW
{
partial class Interfata
{
/// 
/// Required designer variable.
/// 
private System.ComponentModel.IContainer components = null;

/// 
/// Clean up any resources being used.
/// 
/// 
true if managed resources should be disposed; otherwise, false.
protected override void Dispose(bool disposing)
{
if (disposing &&  (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows Form Designer generated code

/// 
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// 
private void InitializeComponent()
{
this.numeCont = new System.Windows.Forms.TextBox();
this.textCampNumeCont = new System.Windows.Forms.Label();
this.soldInitial = new System.Windows.Forms.NumericUpDown();
this.textCampSoldInitial = new System.Windows.Forms.Label();
this.btnCreareCont = new System.Windows.Forms.Button();
this.btnActualizareCont = new System.Windows.Forms.Button();
this.btnStergereCont = new System.Windows.Forms.Button();
this.titluFormular = new System.Windows.Forms.Label();
this.dataGridViewConturi = new System.Windows.Forms.DataGridView();
this.textCampSoldCurent = new System.Windows.Forms.Label();
this.soldCurent = new System.Windows.Forms.NumericUpDown();
((System.ComponentModel.ISupportInitialize)(this.soldInitial)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataGridViewConturi)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.soldCurent)).BeginInit();
this.SuspendLayout();
//
// numeCont
//
this.numeCont.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.numeCont.Location = new System.Drawing.Point(231, 81);
this.numeCont.Name = "numeCont";
this.numeCont.Size = new System.Drawing.Size(411, 20);
this.numeCont.TabIndex = 0;
//
// textCampNumeCont
//
this.textCampNumeCont.AutoSize = true;
this.textCampNumeCont.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textCampNumeCont.Location = new System.Drawing.Point(127, 81);
this.textCampNumeCont.Name = "textCampNumeCont";
this.textCampNumeCont.Size = new System.Drawing.Size(98, 20);
this.textCampNumeCont.TabIndex = 1;
this.textCampNumeCont.Text = "Nume cont : ";
//
// soldInitial
//
this.soldInitial.Location = new System.Drawing.Point(231, 117);
this.soldInitial.Maximum = new decimal(new int[] {
100000,
0,
0,
0});
this.soldInitial.Name = "soldInitial";
this.soldInitial.Size = new System.Drawing.Size(145, 20);
this.soldInitial.TabIndex = 2;
//
// textCampSoldInitial
//
this.textCampSoldInitial.AutoSize = true;
this.textCampSoldInitial.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textCampSoldInitial.Location = new System.Drawing.Point(127, 117);
this.textCampSoldInitial.Name = "textCampSoldInitial";
this.textCampSoldInitial.Size = new System.Drawing.Size(94, 20);
this.textCampSoldInitial.TabIndex = 3;
this.textCampSoldInitial.Text = "Sold Initial :  ";
//
// btnCreareCont
//
this.btnCreareCont.ForeColor = System.Drawing.Color.LimeGreen;
this.btnCreareCont.Location = new System.Drawing.Point(153, 157);
this.btnCreareCont.Name = "btnCreareCont";
this.btnCreareCont.Size = new System.Drawing.Size(121, 47);
this.btnCreareCont.TabIndex = 4;
this.btnCreareCont.Text = "Creare cont";
this.btnCreareCont.UseVisualStyleBackColor = true;
this.btnCreareCont.Click += new System.EventHandler(this.btnCreareCont_Click);
//
// btnActualizareCont
//
this.btnActualizareCont.ForeColor = System.Drawing.Color.DeepSkyBlue;
this.btnActualizareCont.Location = new System.Drawing.Point(320, 157);
this.btnActualizareCont.Name = "btnActualizareCont";
this.btnActualizareCont.Size = new System.Drawing.Size(121, 47);
this.btnActualizareCont.TabIndex = 5;
this.btnActualizareCont.Text = "Actualizare cont";
this.btnActualizareCont.UseVisualStyleBackColor = true;
this.btnActualizareCont.Click += new System.EventHandler(this.btnActualizareCont_Click);
//
// btnStergereCont
//
this.btnStergereCont.ForeColor = System.Drawing.Color.Red;
this.btnStergereCont.Location = new System.Drawing.Point(489, 157);
this.btnStergereCont.Name = "btnStergereCont";
this.btnStergereCont.Size = new System.Drawing.Size(121, 47);
this.btnStergereCont.TabIndex = 6;
this.btnStergereCont.Text = "Sterge cont";
this.btnStergereCont.UseVisualStyleBackColor = true;
this.btnStergereCont.Click += new System.EventHandler(this.btnStergeCont_Click);
//
// titluFormular
//
this.titluFormular.AutoSize = true;
this.titluFormular.Font = new System.Drawing.Font("Microsoft Sans Serif", 20.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.titluFormular.Location = new System.Drawing.Point(219, 20);
this.titluFormular.Name = "titluFormular";
this.titluFormular.Size = new System.Drawing.Size(345, 31);
this.titluFormular.TabIndex = 7;
this.titluFormular.Text = "Formular gestionare conturi";
//
// dataGridViewConturi
//
this.dataGridViewConturi.AllowUserToOrderColumns = true;
this.dataGridViewConturi.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
this.dataGridViewConturi.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridViewConturi.Location = new System.Drawing.Point(12, 228);
this.dataGridViewConturi.Name = "dataGridViewConturi";
this.dataGridViewConturi.RowHeadersVisible = false;
this.dataGridViewConturi.Size = new System.Drawing.Size(776, 210);
this.dataGridViewConturi.TabIndex = 8;
this.dataGridViewConturi.CellClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridViewConturi_CellClick);
//
// textCampSoldCurent
//
this.textCampSoldCurent.AutoSize = true;
this.textCampSoldCurent.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textCampSoldCurent.Location = new System.Drawing.Point(397, 117);
this.textCampSoldCurent.Name = "textCampSoldCurent";
this.textCampSoldCurent.Size = new System.Drawing.Size(93, 20);
this.textCampSoldCurent.TabIndex = 9;
this.textCampSoldCurent.Text = "Sold Curent";
//
// soldCurent
//
this.soldCurent.Location = new System.Drawing.Point(497, 117);
this.soldCurent.Maximum = new decimal(new int[] {
100000,
0,
0,
0});
this.soldCurent.Name = "soldCurent";
this.soldCurent.Size = new System.Drawing.Size(145,  20);
this.soldCurent.TabIndex = 10;
//
// Interfata
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(800, 450);
this.Controls.Add(this.soldCurent);
this.Controls.Add(this.textCampSoldCurent);
this.Controls.Add(this.dataGridViewConturi);
this.Controls.Add(this.titluFormular);
this.Controls.Add(this.btnStergereCont);
this.Controls.Add(this.btnActualizareCont);
this.Controls.Add(this.btnCreareCont);
this.Controls.Add(this.textCampSoldInitial);
this.Controls.Add(this.soldInitial);
this.Controls.Add(this.textCampNumeCont);
this.Controls.Add(this.numeCont);
this.Name = "Interfata";
this.Text = "Interfata";
((System.ComponentModel.ISupportInitialize)(this.soldInitial)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataGridViewConturi)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.soldCurent)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.TextBox numeCont;
private System.Windows.Forms.Label textCampNumeCont;
private System.Windows.Forms.NumericUpDown soldInitial;
private System.Windows.Forms.Label textCampSoldInitial;
private System.Windows.Forms.Button btnCreareCont;
private System.Windows.Forms.Button btnActualizareCont;
private System.Windows.Forms.Button btnStergereCont;
private System.Windows.Forms.Label titluFormular;
private System.Windows.Forms.DataGridView dataGridViewConturi;
private System.Windows.Forms.Label textCampSoldCurent;
private System.Windows.Forms.NumericUpDown soldCurent;
}
}

Это мой код. Я пытался использовать текст в консоли для отладки. Когда я отлаживаю, он останавливается здесь: Application.Run(new Interfata());


Подробнее здесь: https://stackoverflow.com/questions/785 ... oes-not-ha