Dynamically create EditItemTemplate at Runtime in a GridView Control

Nadine Storandt — Tue, 10 Jul 2007 15:28:00 GMT

It's very easy to implement this feature to your project:

you only must create a new class and copy the code below to this class:

public class DynamicallyTemplatedGridViewHandler : ITemplate

{

ListItemType ItemType;

string FieldName;

string InfoType;

public DynamicallyTemplatedGridViewHandler(ListItemType item_type, string field_name, string control_type)

{

ItemType = item_type;

FieldName = field_name;

InfoType = control_type;

}

implemented here the EditItem object but you can also define SelectedItems, Header, Footer etc

public void InstantiateIn(System.Web.UI.Control Container)

{

switch (ItemType)

{

case ListItemType.EditItem:

if (InfoType == "Button")

{

ImageButton update_button = new ImageButton();

update_button.ID = "update_button";

update_button.CommandName = "Update";

update_button.ImageUrl = "~/images/update.gif";

update_button.ToolTip = "Update";

update_button.OnClientClick =

"return confirm('Are you sure to update the record?')";

Container.Controls.Add(update_button);

// Similarly, add a button for Cancel

}

else

// if other key and non key fields then bind textboxes with texts

{

TextBox field_txtbox = new TextBox();

field_txtbox.ID = FieldName;

field_txtbox.Text = String.Empty;

// if to update then bind the textboxes with coressponding field texts

//otherwise for insert no need to bind it with text

if ((int)new Page().Session["InsertFlag"] == 0)

field_txtbox.DataBinding += new EventHandler(OnDataBinding);

Container.Controls.Add(field_txtbox);

}

break;

}

private void OnDataBinding(object sender, EventArgs e)

{

object bound_value_obj = null;

Control ctrl = (Control)sender;

IDataItemContainer data_item_container =

(IDataItemContainer)ctrl.NamingContainer;

bound_value_obj = DataBinder.Eval(data_item_container.DataItem, FieldName);

switch (ItemType)

{

case ListItemType.Item:

Label field_ltrl = (Label)sender;

field_ltrl.Text = bound_value_obj.ToString();

break;

case ListItemType.EditItem:

TextBox field_txtbox = (TextBox)sender;

field_txtbox.Text = bound_value_obj.ToString();

break;

}

The usage of this class is very easy. Before you bind your GridView to a dataSource you have to call the following line for each colum which should be have a EditItemTemplate.

TemplateField ItemTmpField = new TemplateField();

// create the header

ItemTmpField.HeaderTemplate = new DynamicallyTemplatedGridViewHandler(ListItemType.EditItem, dt.Columns[4].ColumnName, dt.Columns[4].DataType.Name);

greets

Nadine's Posts : .NET 2.0

Dynamically create EditItemTemplate at Runtime in a GridView Control