我面临一个非常奇怪的问题，应该非常简单。 我想要实现的目标：我有2个datagrids：1个带有invoiceheaders，1个带有invoiceDetails。
当我点击发票抬头中的特定行时，invoicedetails需要更改并显示该发票的特定详细信息。我正在使用的事件是dgvInvoiceHeaders_SelectionChanged。
视图中的代码：
private void InvoiceListView_Load(object sender, EventArgs e)
{
int invoiceId = 1;
invoiceHeadersBinding.DataSource = invoiceListPresenter.getInvoiceHeaders();
dgvInvoiceHeaders.DataSource = invoiceHeadersBinding;
setInvoiceHeaderColumns();
if (dgvInvoiceHeaders.CurrentRow != null)
{
Int32.TryParse(dgvInvoiceHeaders.CurrentRow.Cells[0].FormattedValue.ToString(), out invoiceId);
}
dgvInvoiceDetails.DataSource = invoiceListPresenter.getSelectedInvoiceDetails(invoiceId);
dgvInvoiceDetails.DataSource = invoiceListPresenter.invoiceDetails;
setInvoiceDetailColumns();
}
private void dgvInvoiceHeaders_SelectionChanged(object sender, EventArgs e)
{
dgvInvoiceDetails.DataSource = invoiceListPresenter.getSelectedInvoiceDetails(Convert.ToInt32(dgvInvoiceHeaders.CurrentRow.Cells[0].FormattedValue.ToString()));
dgvInvoiceDetails.DataSource = invoiceListPresenter.invoiceDetails;
setInvoiceDetailColumns();
}
这是我调用的方法的代码：
public List<tbl_invoices> invoiceHeaders;
public BindingList<tbl_invoices> getInvoiceHeaders()
{
try
{
using (var invoices = new DBCrownfishEntities())
{
invoices.Configuration.LazyLoadingEnabled = false;
var invoice = from i in invoices.tbl_invoices
select i;
invoiceHeaders = invoice.ToList();
var listBinding = new BindingList<tbl_invoices>(invoiceHeaders);
return listBinding;
}
}
catch (Exception exe)
{
throw exe;
}
}
public List<tbl_invoiceDetail> invoiceDetails;
public BindingList<tbl_invoiceDetail> getSelectedInvoiceDetails(int invoiceID)
{
try
{
using (var invoices = new DBCrownfishEntities())
{
invoices.Configuration.LazyLoadingEnabled = false;
var invoiceDetail = from i in invoices.tbl_invoiceDetail
where i.InvoiceID == invoiceID
select i;
invoiceDetails = invoiceDetail.ToList();
var listBinding = new BindingList<tbl_invoiceDetail>(invoiceDetails);
return listBinding;
}
}
catch (Exception exe)
{
throw exe;
}
}
但是使用此示例正确加载了formload。但是在事件被触发后，我的invoiceheader datagrid为空。当我将文本放在方法dgvInvoiceHeaders_selectionChanged()的注释中时，我看到两个数据网格都被正确填充。
向正确的方向推进将非常友好。