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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 VerificaDatiDataGridView { public partial class Form1 : Form { private Boolean caricamentoDB = false; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { InizializzaDatiDataGridWiew(); } private void InizializzaDatiDataGridWiew() { DataTable dt = new DataTable(); dt.Columns.Add(new DataColumn("colID", typeof(int))); dt.Columns.Add(new DataColumn("colName", typeof(string))); dt.Rows.Add("1", "Mario Rossi"); dt.Rows.Add("2", "Mario Bianchi"); dt.Rows.Add("3", "Mario Verdi"); dataGridView1.DataSource = dt; caricamentoDB = true; } private int trovaRigaValore(String searchValue, int rigaDaEscludere=-1) { int rowIndex = -1; //Info row foreach (DataGridViewRow row in dataGridView1.Rows) { if (row.Index != rigaDaEscludere) { if (row.Cells[1].Value.ToString().Equals(searchValue)) { rowIndex = row.Index; //her you got the cell to work with return rowIndex; } } } return rowIndex; } private Boolean cercaValoreColonna(String searchValue,int rigaDaEscludere=-1) { //int rowIndex = -1; //Info row foreach (DataGridViewRow row in dataGridView1.Rows) { if (!((row.Cells["colID"].Value == null) && row.Cells["colID"].EditedFormattedValue.ToString() == string.Empty)) { if (rigaDaEscludere != -1) { if (row.Index != rigaDaEscludere) { if (row.Cells["colID"].Value.ToString().Equals(searchValue)) { //rowIndex = row.Index; //her you got the cell to work with return true; } } } } } return false; } private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e) { if (caricamentoDB == true) { if (cercaValoreColonna(dataGridView1.Rows[e.RowIndex].Cells["colID"].Value.ToString(),e.RowIndex) == true) { Console.Write("errore"); dataGridView1.Rows[e.RowIndex].ErrorText = "Valore ID già presente nel DataGridView"; } } } } }
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