📄 temp2.aspx
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<%@ Import Namespace="System.Data" %>
<html>
<script language="C#" runat="server">
DataTable Cart = new DataTable();
DataView CartView;
void Page_Load(Object sender, EventArgs e) {
DataRow dr;
if (Session["ShoppingCart"] == null) {
Cart.Columns.Add(new DataColumn("Qty", typeof(String)));
Cart.Columns.Add(new DataColumn("Item", typeof(String)));
Cart.Columns.Add(new DataColumn("Price", typeof(String)));
Session["ShoppingCart"] = Cart;
// Make some rows and put some sample data in
for (int i = 1; i <= 4; i++) {
dr = Cart.NewRow();
if (i % 2 != 0)
dr[0] = "2";
else
dr[0] = "1";
dr[1] = "Item " + i.ToString();
dr[2] = (1.23 * (i + 1)).ToString();
Cart.Rows.Add(dr);
}
}
else
Cart = (DataTable)Session["ShoppingCart"];
CartView = new DataView(Cart);
CartView.Sort="Item";
if (!IsPostBack)
BindGrid();
}
void MyDataGrid_Edit(Object sender, DataGridCommandEventArgs e) {
MyDataGrid.EditItemIndex = e.Item.ItemIndex;
BindGrid();
}
void MyDataGrid_Cancel(Object sender, DataGridCommandEventArgs e) {
MyDataGrid.EditItemIndex = -1;
BindGrid();
}
void MyDataGrid_Update(Object sender, DataGridCommandEventArgs e) {
// For bound columns the edited value is stored in a textbox,
// and the textbox is the 0th element in the column's cell
TextBox qtyText = (TextBox)e.Item.Cells[2].Controls[0];
TextBox priceText = (TextBox)e.Item.Cells[3].Controls[0];
String item = e.Item.Cells[1].Text;
String qty = qtyText.Text;
String price = priceText.Text;
DataRow dr;
// with a database, we'd use an update command. Since we're using an in-memory
// DataTable, we'll delete the old row and replace it with a new one
// remove old entry
CartView.RowFilter = "Item='" + item + "'";
if (CartView.Count > 0)
CartView.Delete(0);
CartView.RowFilter = "";
// add new entry
dr = Cart.NewRow();
dr[0] = qty;
dr[1] = item;
dr[2] = price;
Cart.Rows.Add(dr);
MyDataGrid.EditItemIndex = -1;
BindGrid();
}
void BindGrid() {
MyDataGrid.DataSource = CartView;
MyDataGrid.DataBind();
}
</script>
<body style="font: 10pt verdana">
<form runat="server">
<h3><font face="Verdana">DataGridCommandEventArgs Example</font></h3>
<asp:DataGrid id="MyDataGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
OnEditCommand="MyDataGrid_Edit"
OnCancelCommand="MyDataGrid_Cancel"
OnUpdateCommand="MyDataGrid_Update"
AutoGenerateColumns="false">
<Columns>
<asp:EditCommandColumn
EditText="Edit"
CancelText="Cancel"
UpdateText="Update"
ItemStyle-Wrap="false"
HeaderText="Edit Command Column"
HeaderStyle-Wrap="false"/>
<asp:BoundColumn HeaderText="Item" ReadOnly="true" DataField="Item"/>
<asp:BoundColumn HeaderText="Quantity" DataField="Qty"/>
<asp:BoundColumn HeaderText="Price" DataField="Price"/>
</Columns>
</asp:DataGrid>
</form>
</body>
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