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POUse of a DataGridView with C# and MySQL
 

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  1. POUse of a DataGridView with C# and MySQL
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    <p>A complete noob speaking here. I have a C# interface in which I interact with MySQL. My problem is that I want to show a DataGridView, but I want to change the content of a column. I guess that with code it's more understandable.</p> <pre><code>private void CargaEstados() { conexion.Open(); txtNomMun.Focus(); try { DataSet ds = new DataSet(); MySqlDataAdapter da = new MySqlDataAdapter("SELECT cveestado, nombre FROM tbestados", conexion); da.Fill(ds, "FillDropDown"); cbEstado.DisplayMember = "Nombre"; cbEstado.ValueMember = "CveEstado"; cbEstado.DataSource = ds.Tables["FillDropDown"]; conexion.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void CargaDataGridView() { conexion.Open(); try { cmd.CommandText = "select cvemunicipio, nombre, cveEstado from tbMunicipios"; rd = cmd.ExecuteReader(); while (rd.Read()) { this.dataGridView1.Rows.Add(rd.GetValue(0), rd.GetValue(1), rd.GetValue(2)); } conexion.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Error); } } </code></pre> <p>In CargaEstados() I display in a Combobox (cbEstado) the name (nombre), but I obtain the id (cveestado) {shown below}. </p> <pre><code>"insert into tbmunicipios (nombre, cveestado) values ('" + txtNomMun.Text + "', '" + cbEstado.SelectedValue.ToString() + "')"; </code></pre> <p>In DataGridView I want to to the opposite, with the id, I want to display the name, but I'm not sure how to do that.</p> <p>My SQL tables are:</p> <pre><code>Create DataBase CatalogoMun; use CatalogoMun; Create table tbEstados ( CveEstado int not null, Nombre varchar (45) not null, Constraint pkCveEstado Primary Key (CveEstado) )Engine=Innodb; Create table tbMunicipios ( CveMunicipio int not null AUTO_INCREMENT, Nombre varchar (45) not null, CveEstado int not null, Constraint pkCveMunicipio Primary Key (CveMunicipio), Constraint fkCVeEdo Foreign Key (CveEstado) references tbEstados (CveEstado) )Engine=Innodb; </code></pre> <p>FOR INSTANCE, If I have (1, Villahermosa, 27) in tbMunicipios, I want to display (1, Villahermosa, Tabasco).</p> <p>THANKS :D</p>
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    1. USJohn Smith
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