Develop Reference

Bug in adding rows to table on the fly

i try adding rows to table on the fly from DataBase but its always the last row that appears only where am i wrong ?
TableCell pNameCell = new TableCell();
TableCell pDescCell = new TableCell();
TableCell pPriceCell = new TableCell();
TableCell pStockCell = new TableCell();
TableCell buyProduct = new TableCell();
HyperLink hl = new HyperLink();
//ds is DataSet
foreach (DataRow dRow in ds.Tables[0].Rows)
{
TableRow row = new TableRow();
pNameCell.Text = dRow["name"].ToString();
row.Cells.Add(pNameCell);
pDescCell.Text = dRow["description"].ToString();
row.Cells.Add(pDescCell);
pPriceCell.Text = dRow["price"].ToString();
row.Cells.Add(pPriceCell);
pStockCell.Text = dRow["Qty"].ToString();
row.Cells.Add(pStockCell);
hl.Text = "Add To Cart";
hl.NavigateUrl = "BuyProduct.aspx?id="+ dRow["pro_id"].ToString();
hl.CssClass = "btn btn-primary";
buyProduct.Controls.Add(hl);
row.Cells.Add(buyProduct);
//TProducts is asp:table ID
TProducts.Rows.Add(row);
}
it should show all the data rows in able

Your table cells are not unique to each iteration of the loop. When you add a cell variable to a row, it maintains a reference to that variable, not a copy. So then in the next iteration of the loop you overwrite the cell variable with the value from the new row, this will also update all the references to that cell.
To fix it, simply move the table cell declarations inside the loop, then their scope will be limited to that iteration, and new variables will be created each time you loop - just like the table row variable already is, in fact:
//ds is DataSet
foreach (DataRow dRow in ds.Tables[0].Rows)
{
TableCell pNameCell = new TableCell();
TableCell pDescCell = new TableCell();
TableCell pPriceCell = new TableCell();
TableCell pStockCell = new TableCell();
TableCell buyProduct = new TableCell();
HyperLink hl = new HyperLink();
TableRow row = new TableRow();
pNameCell.Text = dRow["name"].ToString();
row.Cells.Add(pNameCell);
pDescCell.Text = dRow["description"].ToString();
row.Cells.Add(pDescCell);
pPriceCell.Text = dRow["price"].ToString();
row.Cells.Add(pPriceCell);
pStockCell.Text = dRow["Qty"].ToString();
row.Cells.Add(pStockCell);
hl.Text = "Add To Cart";
hl.NavigateUrl = "BuyProduct.aspx?id="+ dRow["pro_id"].ToString();
hl.CssClass = "btn btn-primary";
buyProduct.Controls.Add(hl);
row.Cells.Add(buyProduct);
//TProducts is table ID
TProducts.Rows.Add(row);
}

How to get value from a cell in table C#

I have table and each row contains a button. If I click the button, I want to retrieve the value from the first column in that particular row. This is my code, how can I do that. Thank you
foreach (var c in list)
{
TableRow row = new TableRow();
TableCell c0 = new TableCell();
c0.Text = string.Format("<img src='"+c.Movie_poster+ "'/>");
TableCell c1 = new TableCell();
c1.Text = c.Name;
TableCell c2 = new TableCell();
c2.Text = c.Date.ToStirng();
TableCell c3 = new TableCell();
c3.Text = c.desc;
TableCell c4 = new TableCell();
c4.Text = c.genre;
TableCell c5 = new TableCell();
//Add each string to cell in row
row.Cells.Add(c0);
row.Cells.Add(c1);
row.Cells.Add(c2);
row.Cells.Add(c3);
row.Cells.Add(c4);
row.Cells.Add(c5);
//Add the row to the table
Table.Rows.Add(row);
Button getname = new Button();
getname.Text = "Reserve";
getname.Click+= new EventHandler(getname_Click);
c5.Controls.Add(getname);
}
}
protected void reserve_Click(object sender,EventArgs e)
{
Button btn = (Button)sender;
TableRow row = (TableRow)btn.
string name = row.Cells[1].Text;
lbl.Text = name;
}

Before create button you should write a new attribute with Row number.
//Add the row to the table
Table.Rows.Add(row);
Button getname = new Button();
getname.Attributes.Add("idRow", idrow);
idrow += 1;
getname.Text = "Reserve";
getname.Click += new EventHandler(getname_Click);
Then in you reserve_Click you should get the row with the ID stored in button attributes
Button btn = (Button)sender;
int idRow = int.Parse(btn.Attributes["id"]);
TableRow row = t.Rows[idRow];

You can bind the value of the Column to the Button as a CommandArgument.
Button getname = new Button();
getname.Text = "Reserve";
getname.CommandName = "Reserve";
getname.CommandArgument = "Column Value";
getname.Command += new CommandEventHandler(Button1_Command);
And then in the Button Command
protected void Button1_Command(object sender, CommandEventArgs e)
{
if (e.CommandName == "Reserve")
{
string columnValue = e.CommandArgument.ToString();
}
}

Dynamic table options

I`m creating a dynamic HTML Table, the table content is from the database.
I think I can do it - but I have 2 question:
How I add a <th> to each column? I want to name to columns I have (CustomerId,ProductId, etc).
How can I click on a specific row?
I want to click on a row and to be directed to a different page.
Note - I'm, not allowed to use DataTable - just HTML Table control.
This is my code:
string SQL_Order_View = "SELECT * FROM Orders";
SqlCommand SQLcmdOrders = new SqlCommand(SQL_Order_View, Conn);
Conn.Open();
SqlDataReader myOrders = SQLcmdOrders.ExecuteReader();
while(myOrders.Read())
{
TableRow tr = new TableRow();
TableCell tdCustomerId = new TableCell();
TableCell tdProductId = new TableCell();
TableCell tdPrice = new TableCell();
tdCustomerId.Text = myOrders["CustomerId"].ToString();
tdProductId.Text = myOrders["ProductId"].ToString();
tdPrice.Text = myOrders["Price"].ToString();
tr.Cells.Add(tdCustomerId);
tr.Cells.Add(tdProductId);
tr.Cells.Add(tdPrice);
tblOrders.Rows.Add(tr);
}
Conn.Close();

1.How I add a to each column
// Create a TableHeaderRow.
TableHeaderRow headerRow = new TableHeaderRow();
// Create TableCell objects to contain
// the text for the header.
TableHeaderCell headerTableCell1 = new TableHeaderCell();
TableHeaderCell headerTableCell2 = new TableHeaderCell();
TableHeaderCell headerTableCell3 = new TableHeaderCell();
headerTableCell1.Text = "CustomerId";
headerTableCell2.Text = "ProductId";
headerTableCell3.Text = "Price";
// Add the TableHeaderCell objects to the Cells
// collection of the TableHeaderRow.
headerRow.Cells.Add(headerTableCell1);
headerRow.Cells.Add(headerTableCell2);
headerRow.Cells.Add(headerTableCell3);
// Add the TableHeaderRow as the first item
// in the Rows collection of the table.
tblOrders.Rows.AddAt(0, headerRow);
2.How can to click on a specific row
tr.Attributes["onclick"] = "<some javascript code here>";

string SQL_Order_View = "SELECT * FROM Orders";
SqlCommand SQLcmdOrders = new SqlCommand(SQL_Order_View, Conn);
Conn.Open();
SqlDataReader myOrders = SQLcmdOrders.ExecuteReader();
// adding header
TableHeaderRow headRow = new TableHeaderRow();
TableHeaderCell thCustomerId = new TableCell();
TableHeaderCell thProductId = new TableCell();
TableHeaderCell thPrice = new TableCell();
thCustomerID.Text = "Customer ID";
thProductId.Text = "Product ID";
thPrice.Text = "Price";
tblOrders.Rows.Add(headRow );
while(myOrders.Read())
{
TableRow tr = new TableRow();
TableCell tdCustomerId = new TableCell();
TableCell tdProductId = new TableCell();
TableCell tdPrice = new TableCell();
tdCustomerId.Text = myOrders["CustomerId"].ToString();
//tdProductId.Text = myOrders["ProductId"].ToString();
//create clickable----
HyperLink lnk= new HyperLink();
lnk.ID = myOrders["ProductId"].ToString();
lnk.NavigateUrl = "your url with some id here";
tdProductId.Controls.Add(lnk);
tdPrice.Text = myOrders["Price"].ToString();
tr.Cells.Add(tdCustomerId);
tr.Cells.Add(tdProductId);
tr.Cells.Add(tdPrice);
tblOrders.Rows.Add(tr);
}
Conn.Close();

Use TableHeaderCell.
Additional information: https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.tableheadercell.aspx

Dynamically Created Form from Controls and Submit Click

Why btnSave_Click doesn't fire? It does postback when I click it but not jump in to handler.
if (Session["mytable"] != null)
pnlContent.Controls.Add((Table)Session["mytable"]);
else
{
Table table = new Table();
foreach (var item in Items)
{
TableRow row = new TableRow();
table.Rows.Add(row);
if (item.ColumnTypeName == "String")
{
TableCell cell = new TableCell();
row.Cells.Add(cell);
cell.Controls.Add(new LiteralControl(item.ColumnName));
TextBox textbox = new TextBox();
textbox.ID = item.ColumnName;
TableCell cell2 = new TableCell();
row.Cells.Add(cell2);
cell2.Controls.Add(textbox);
}
}
LinkButton btnSave = new LinkButton();
btnSave.ID = "btnSave";
btnSave.Click += new EventHandler(btnSave_Click);
btnSave.Text = "Submit";
TableRow row1 = new TableRow();
table.Rows.Add(row1);
TableCell cell3 = new TableCell();
row1.Cells.Add(cell3);
cell3.Controls.Add(btnSave);
pnlContent.Controls.Add(table);
Session["mytable"] = table;
}
protected void btnSave_Click(object sender, EventArgs e)
{
//TADAA
}

Inserting DropDownList in a TableCell

while (reader.Read())
{
TableRow r = new TableRow();
TableCell c = new TableCell();
c.Controls.Add(new LiteralControl(reader["Name"].ToString()));
r.Cells.Add(c);
Table1.Rows.Add(r);
TableCell c1 = new TableCell();
c1.Controls.Add(new LiteralControl(reader["RollID"].ToString()));
r.Cells.Add(c1);
Table1.Rows.Add(r);
}
i want to add another cell with a dropdownlist for every row.Could any one sort me out with this issue?

You can do like...
DropDownList ddl = new DropDownList();
ddl.ID = "ddl";
ddl.Items.Add(new ListItem("Text", "Value")); // add list items
TableCell c2 = new TableCell();
c2.Controls.Add(ddl);
r.Cells.Add(c2);
Table1.Rows.Add(r);