Question

try
{
    OdbcConnection conn = new OdbcConnection();
    conn.ConnectionString =
    "Dsn=mdc;" +
    "Uid=root;" +
    "Pwd=;";
    OdbcCommand cmd = new OdbcCommand("UPDATE tbl_delivery SET Address = @Address, AssetNumber = @AssetNumber, Contact = @Contact, DRNumber = @DRNumber, InvoiceNumber = @InvoiceNumber, ItemQty = @ItemQty, PONumber = @PONumber, ReceivedBy = @ReceivedBy, Supplier = @Supplier WHERE No = @No;", conn);

    //DataRowView drv = (DataRowView) comboBox1.SelectedValue;
    cmd.Parameters.AddWithValue("@No", noTextBox.Text);
    cmd.Parameters.AddWithValue("@AssetNumber", assetNumberTextBox.Text);
    cmd.Parameters.AddWithValue("@Contact", contactTextBox.Text);
    cmd.Parameters.AddWithValue("@DRNumber", dRNumberTextBox.Text);
    cmd.Parameters.AddWithValue("@InvoiceNumber", invoiceNumberTextBox.Text);
    cmd.Parameters.AddWithValue("@ItemQty", itemQtyTextBox.Text);
    cmd.Parameters.AddWithValue("@PONumber", pONumberTextBox.Text);
    cmd.Parameters.AddWithValue("@ReceivedBy", receivedByTextBox.Text);
    cmd.Parameters.AddWithValue("@Supplier", supplierTextBox.Text);
    cmd.CommandType = CommandType.Text;
    OdbcDataAdapter ds = new OdbcDataAdapter(cmd);
    ds.SelectCommand = cmd;
    System.Data.DataTable dtable = new System.Data.DataTable();
    ds.Fill(dtable);
    tbl_deliveryDataGridView.DataSource = dtable;
    conn.Open();
    cmd.ExecuteNonQuery();
    MessageBox.Show("update successful");
}
catch (Exception ex)
{
    MessageBox.Show(ex.Message);
}

每当我从datagridview点击一个数据并使用文本框更改它时，它就不会更新。

Answer 1

您希望使用OdbcDataAdapter和更新命令填充DataTable。

编辑：

以下是代码中的剪切：

//here your cmd is set to UPDATE
OdbcCommand cmd = new OdbcCommand("UPDATE tbl_delivery SET Address = @Address, AssetNumber = @AssetNumber, Contact = @Contact, DRNumber = @DRNumber, InvoiceNumber = @InvoiceNumber, ItemQty = @ItemQty, PONumber = @PONumber, ReceivedBy = @ReceivedBy, Supplier = @Supplier WHERE No = @No;", conn);

//here your SelectCommand is set to UPDATE
ds.SelectCommand = cmd; 

//here you fill your datatable
ds.Fill(dtable);

您应该正确设置SelectCommand和UpdateCommand。您无法使用UPDATE填充数据表。

Answer 2

如果您的查询提供了预期的结果，并且数据在当时的数据库中得到更新。然后你需要ReBind网格将更新的数据加载到网格中。

让Gv_delivery成为您的数据网格，然后代码如下：

Gv_delivery.Rebind

执行更新后要附加到代码的代码。

更新按钮不会更新DataGridView C＃上的数据

2 个答案: