public override DataTable GetSchemaTable()
{
// Only Results from SQL SELECT Queries
// get a DataTable for schema of the result
// otherwise, DataTable is null reference
if (FieldCount == 0) return null;
DataTable dataTableSchema = new DataTable("SchemaTable");
dataTableSchema.Columns.Add("ColumnName", typeof(string));
dataTableSchema.Columns.Add("ColumnOrdinal", typeof(int));
dataTableSchema.Columns.Add("ColumnSize", typeof(int));
dataTableSchema.Columns.Add("NumericPrecision", typeof(int));
dataTableSchema.Columns.Add("NumericScale", typeof(int));
dataTableSchema.Columns.Add("IsUnique", typeof(bool));
dataTableSchema.Columns.Add("IsKey", typeof(bool));
DataColumn dc = dataTableSchema.Columns["IsKey"];
dc.AllowDBNull = true; // IsKey can have a DBNull
dataTableSchema.Columns.Add("BaseCatalogName", typeof(string));
dataTableSchema.Columns.Add("BaseColumnName", typeof(string));
dataTableSchema.Columns.Add("BaseSchemaName", typeof(string));
dataTableSchema.Columns.Add("BaseTableName", typeof(string));
dataTableSchema.Columns.Add("DataType", typeof(Type));
dataTableSchema.Columns.Add("AllowDBNull", typeof(bool));
dataTableSchema.Columns.Add("ProviderType", typeof(int));
dataTableSchema.Columns.Add("IsAliased", typeof(bool));
dataTableSchema.Columns.Add("IsExpression", typeof(bool));
dataTableSchema.Columns.Add("IsIdentity", typeof(bool));
dataTableSchema.Columns.Add("IsAutoIncrement", typeof(bool));
dataTableSchema.Columns.Add("IsRowVersion", typeof(bool));
dataTableSchema.Columns.Add("IsHidden", typeof(bool));
dataTableSchema.Columns.Add("IsLong", typeof(bool));
dataTableSchema.Columns.Add("IsReadOnly", typeof(bool));
int ord = 1;
for (int i = 0; i < FieldCount; i++)
{
MySqlField f = resultSet.Fields[i];
DataRow r = dataTableSchema.NewRow();
r["ColumnName"] = f.ColumnName;
r["ColumnOrdinal"] = ord++;
r["ColumnSize"] = f.IsTextField ? f.ColumnLength / f.MaxLength : f.ColumnLength;
int prec = f.Precision;
int pscale = f.Scale;
if (prec != -1)
r["NumericPrecision"] = (short)prec;
if (pscale != -1)
r["NumericScale"] = (short)pscale;
r["DataType"] = GetFieldType(i);
r["ProviderType"] = (int)f.Type;
r["IsLong"] = f.IsBlob && f.ColumnLength > 255;
r["AllowDBNull"] = f.AllowsNull;
r["IsReadOnly"] = false;
r["IsRowVersion"] = false;
r["IsUnique"] = f.IsUnique;
r["IsKey"] = f.IsPrimaryKey;
r["IsAutoIncrement"] = f.IsAutoIncrement;
r["BaseSchemaName"] = f.DatabaseName;
r["BaseCatalogName"] = null;
r["BaseTableName"] = f.RealTableName;
r["BaseColumnName"] = f.OriginalColumnName;
dataTableSchema.Rows.Add(r);
}
return dataTableSchema;
}
private void B_BDD_SQL_execute_Click(object sender, EventArgs e)
{
//nettoit completement la DGV
clear_SQL_DGV(DGV_GestionBDD_SQL_resultat);
//remplie la DGV
string requete = (string)CB_BDD_SQL_command.SelectedItem + " " + TB_BDD_SQL_column.Text + " " + L_BDD_SQL_from.Text + " " + (string)CB_BDD_SQL_table.SelectedItem + " " + L_GestionBDD_SQL_set_values.Text + " " + TB_GestionBDD_SQL_set_values.Text;
if (TB_BDD_SQL_condition.Text != "")
{
requete += " " + L_BDD_SQL_where.Text + " " + TB_BDD_SQL_condition.Text;
}
requete = requete.Split(';')[0];
try
{
switch ((string)CB_BDD_SQL_command.SelectedItem)
{
case "SELECT": Variable_Compte.Connection.Open();
Lecture = new MySqlCommand(requete, Variable_Compte.Connection);
Resultat = Lecture.ExecuteReader();
DataTable schemaTable = Resultat.GetSchemaTable();
for (int C = 0; C < schemaTable.Rows.Count; C++)
{
int emplacement = DGV_GestionBDD_SQL_resultat.Columns.Add(C.ToString(), schemaTable.Rows[C].ItemArray[0].ToString());
DGV_GestionBDD_SQL_resultat.Columns[emplacement].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
}
string[] row = new string[DGV_GestionBDD_SQL_resultat.Columns.Count];
while (Resultat.Read())
{
for (int i = 0; i < DGV_GestionBDD_SQL_resultat.Columns.Count; i++)
{
row[i] = Resultat[DGV_GestionBDD_SQL_resultat.Columns[i].HeaderText].ToString();
}
DGV_GestionBDD_SQL_resultat.Rows.Add(row);
}
Variable_Compte.Connection.Close();
label_NB_Ligne_Requete.Visible = true;
label_NB_Ligne_Requete.Text = DGV_GestionBDD_SQL_resultat.RowCount.ToString() + " lignes trouvées";
break;
case "UPDATE": Variable_Compte.Connection.Open();
Lecture = new MySqlCommand(requete, Variable_Compte.Connection);
Resultat = Lecture.ExecuteReader();
Variable_Compte.Connection.Close();
label_NB_Ligne_Requete.Visible = false;
MessageBox.Show("Base de données mise à jour.", "Opération efectuée");
break;
case "DELETE": Variable_Compte.Connection.Open();
Lecture = new MySqlCommand(requete, Variable_Compte.Connection);
Resultat = Lecture.ExecuteReader();
Variable_Compte.Connection.Close();
label_NB_Ligne_Requete.Visible = false;
MessageBox.Show("Base de données mise à jour.", "Opération efectuée");
break;
case "INSERT": Variable_Compte.Connection.Open();
ecriture = new MySqlCommand(requete, Variable_Compte.Connection);
ecriture.ExecuteNonQuery();
Variable_Compte.Connection.Close();
label_NB_Ligne_Requete.Visible = false;
MessageBox.Show("Base de données mise à jour.", "Opération efectuée");
break;
default: MessageBox.Show("Veuillez selectionner un ordre à exécuter sur la base de données.", "Opération annulée");
break;
}
}
catch (Exception ex)
{
MessageBox.Show("Une erreur s'est produite, veuillez vérifier votre requête SQL." + Environment.NewLine + ex.Message, "Opération annulée");
Variable_Compte.Connection.Close();
}
// permet de resize la DGV en fonction du nombre de ligne
if (40 + (DGV_GestionBDD_SQL_resultat.RowCount) * 22 < 254)
{
DGV_GestionBDD_SQL_resultat.Height = 40 + (DGV_GestionBDD_SQL_resultat.RowCount) * 22;
}
else
{
DGV_GestionBDD_SQL_resultat.Height = 254;
}
DGV_GestionBDD_SQL_resultat.CurrentCell.Selected = false;
}
