我以前问过这个问题，但遗憾的是我仍然遇到问题并且问题没有得到解决。基本上，我正在为正在生成的表的每一行动态创建一个 LinkButton，并且该按钮的任务是从数据库中删除具有相应 ID 的行。为此，我似乎需要为 LinkButton 分配一个命令，以便在单击它时进入事件。问题是，当单击按钮时，程序永远不会进入命令 - 我已经在其中放置了断点，但它永远不会进入它们。这是我的代码：
protected void Page_Init(object sender, EventArgs e)
{
if (Request.QueryString["id"] != null)
{
ColorConverter conv = new ColorConverter();
string connection = ConfigurationManager.ConnectionStrings["TPRTestConnectionString"].ConnectionString;
TPRDBDataContext dc = new TPRDBDataContext();
DataContext db = new DataContext(connection);
Table<SageAccount> SageAccount = db.GetTable<SageAccount>();
Table<InvoiceItem> InvoiceItem = db.GetTable<InvoiceItem>();
Table<Invoice> Invoice = db.GetTable<Invoice>();
Boolean alloweditting = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s.alloweditting).Single();
if (alloweditting == false)
{
dtlsInsert.Visible = false;
modalPanel.Visible = false;
}
int sagepk = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s.sageaccount).Single();
lblSageID.Text = (from s in dc.SageAccounts where s.ID == sagepk select s.SageID).Single();
lblDate.Text = DateTime.Now.ToShortDateString();
Table table = new Table();
table.Width = Unit.Percentage(100);
table.GridLines = (GridLines)3;
TableHeaderRow header = new TableHeaderRow();
header.BackColor = (System.Drawing.Color)conv.ConvertFromString("#EDEDED");
foreach (string header2 in new string[] { "", "Quantity", "Rate", "Description", "Nominal Code", "Subtotal" })
{
TableCell cell = new TableCell();
cell.Text = header2;
header.Cells.Add(cell);
}
table.Rows.Add(header);
var data = (from s in dc.InvoiceItems where s.invoiceid.ToString() == Request.QueryString["id"].ToString() select s);
foreach (var x in data)
{
TableRow row = new TableRow();
if (x.invoicetext == null)
{
decimal total;
try
{
total = (decimal)x.rate * (decimal)x.quantity;
}
catch
{
total = 0;
}
int i = 0;
foreach (string columnData in new string[] { x.id.ToString(), x.quantity.ToString(), x.rate.ToString(), x.description, x.nominalcode, total.ToString("N2") })
{
TableCell cell = new TableCell();
{
if (i == 0)
{
LinkButton lnkdel = new LinkButton();
lnkdel.Text = "Delete";
lnkdel.ID = "lnkDel" + Guid.NewGuid();
if (alloweditting == false)
{
lnkdel.Enabled = false;
}
lnkdel.Font.Bold = false;
lnkdel.CommandArgument = x.id.ToString();
//lnkdel.Command += lnkdel_Command;
//lnkdel.Command += new CommandEventHandler(this.lnkdel);
cell.Controls.Add(lnkdel);
i++;
}
else
{
cell.Text = columnData;
}
}
row.Cells.Add(cell);
}
runningtotal = runningtotal + total;
}
else
{
int i = 0;
foreach (string columnData in new string[] { x.id.ToString(), x.invoicetext })
{
TableCell cell = new TableCell();
if (i == 0)
{
LinkButton lnkdel = new LinkButton();
lnkdel.Text = "Delete";
lnkdel.ID = "lnkDel" + Guid.NewGuid();
if (alloweditting == false)
{
lnkdel.Enabled = false;
}
lnkdel.Font.Bold = false;
//lnkdel.Command += lnkdel_Command;
//lnkdel.Command += new CommandEventHandler(this.lnkdel);
lnkdel.CommandArgument = x.id.ToString();
cell.Controls.Add(lnkdel);
i++;
}
else
{
cell.Text = columnData;
cell.ColumnSpan = 5;
}
row.Cells.Add(cell);
}
}
switch (x.formatoptions)
{
case 1:
row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("black");
row.Font.Bold = false;
break;
case 2:
row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("black");
row.Font.Bold = true;
break;
case 3:
row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("red");
row.Font.Bold = false;
break;
case 4:
row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("red");
row.Font.Bold = true;
break;
}
table.Rows.Add(row);
}
TableFooterRow row2 = new TableFooterRow();
TableCell cell2 = new TableCell();
cell2.Text = "<span style\"text-align: right; width: 100%;\">Total = <b>" + runningtotal.ToString("N2") + "</b></span>";
cell2.ColumnSpan = 6;
row2.Cells.Add(cell2);
table.Rows.Add(row2);
var update = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s).Single();
update.total = runningtotal;
dc.SubmitChanges();
datatable.Controls.Clear();
datatable.Controls.Add(table);
}
else
{
Response.Redirect("Invoices.aspx");
}
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void lnkdel_Command(object sender, CommandEventArgs e)
{
string connection = ConfigurationManager.ConnectionStrings["TPRTestConnectionString"].ConnectionString;
using (SqlConnection conn = new SqlConnection(connection))
{
SqlCommand comm = new SqlCommand("DELETE FROM InvoiceItem WHERE id = @id", conn);
comm.Parameters.AddWithValue("@id", e.CommandArgument.ToString());
conn.Open();
try
{
comm.ExecuteNonQuery();
}
catch (Exception ex)
{
Response.Write(ex);
}
}
}
请注意，我已经注释掉了要在此处发布的 2 条关键行，只是为了指出我已经尝试了两条被注释掉的行，但都不起作用:(