Я работаю над редактируемым Nested GridView.
Я нашел эту статью Найдено в коде проекта
Я хочу добиться того же, связав 2 родительско-дочерние сетки из Code-Behind вместо asp: AccessDataSource со страницы разметки.
Также, пожалуйста, предложите, как реализовать это с помощью панели обновления, так как при использовании панели обновления, когда я нажимаю кнопку редактирования в дочерней сетке, она сворачивает дочернюю сетку.
Я пробовал что-то подобное, но у меня ничего не получилось.
public partial class test : System.Web.UI.Page
{
#region Variables
string gvUniqueID = String.Empty;
int gvNewPageIndex = 0;
int gvEditIndex = -1;
string gvSortExpr = String.Empty;
private string gvSortDir
{
get { return ViewState["SortDirection"] as string ?? "ASC"; }
set { ViewState["SortDirection"] = value; }
}
#endregion
protected void Page_Load(object sender, EventArgs e)
{
userroles a = new userroles();
this.GridView1.DataSource = a.GetCustomersTable();
this.GridView1.DataBind();
}
//This procedure returns the Sort Direction
private string GetSortDirection()
{
switch (gvSortDir)
{
case "ASC":
gvSortDir = "DESC";
break;
case "DESC":
gvSortDir = "ASC";
break;
}
return gvSortDir;
}
//This procedure prepares the query to bind the child GridView
private AccessDataSource ChildDataSource(string strCustometId, string strSort)
{
string strQRY = "";
AccessDataSource dsTemp = new AccessDataSource();
dsTemp.DataFile = "App_Data/Northwind.mdb";
strQRY = "SELECT [Orders].[CustomerID],[Orders].[OrderID]," +
"[Orders].[ShipAddress],[Orders].[Freight],[Orders].[ShipName] FROM [Orders]" +
" WHERE [Orders].[CustomerID] = '" + strCustometId + "'" +
"UNION ALL " +
"SELECT '" + strCustometId + "','','','','' FROM [Orders] WHERE [Orders].[CustomerID] = '" + strCustometId + "'" +
"HAVING COUNT(*)=0 " + strSort;
dsTemp.SelectCommand = strQRY;
return dsTemp;
}
#region GridView1 Event Handlers
//This event occurs for each row
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
GridViewRow row = e.Row;
string strSort = string.Empty;
// Make sure we aren't in header/footer rows
if (row.DataItem == null)
{
return;
}
//Find Child GridView control
GridView gv = new GridView();
gv = (GridView)row.FindControl("GridView2");
//Check if any additional conditions (Paging, Sorting, Editing, etc) to be applied on child GridView
if (gv.UniqueID == gvUniqueID)
{
gv.PageIndex = gvNewPageIndex;
gv.EditIndex = gvEditIndex;
//Check if Sorting used
if (gvSortExpr != string.Empty)
{
GetSortDirection();
strSort = " ORDER BY " + string.Format("{0} {1}", gvSortExpr, gvSortDir);
}
//Expand the Child grid
ClientScript.RegisterStartupScript(GetType(), "Expand", "<SCRIPT LANGUAGE='javascript'>expandcollapse('div" + ((DataRowView)e.Row.DataItem)["CustomerID"].ToString() + "','one');</script>");
}
//Prepare the query for Child GridView by passing the Customer ID of the parent row
gv.DataSource = ChildDataSource(((DataRowView)e.Row.DataItem)["CustomerID"].ToString(), strSort);
gv.DataBind();
//Add delete confirmation message for Customer
//LinkButton l = (LinkButton)e.Row.FindControl("linkDeleteCust");
//l.Attributes.Add("onclick", "javascript:return " +
//"confirm('Are you sure you want to delete this Customer " +
//DataBinder.Eval(e.Row.DataItem, "CustomerID") + "')");
}
#endregion
#region GridView2 Event Handlers
protected void GridView2_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
gvNewPageIndex = e.NewPageIndex;
GridView1.DataBind();
}
protected void GridView2_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "AddOrder")
{
try
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
//Get the values stored in the text boxes
string strCustomerID = gvTemp.DataKeys[0].Value.ToString(); //Customer ID is stored as DataKeyNames
string strFreight = ((TextBox)gvTemp.FooterRow.FindControl("txtFreight")).Text;
string strShipperName = ((TextBox)gvTemp.FooterRow.FindControl("txtShipperName")).Text;
string strShipAdress = ((TextBox)gvTemp.FooterRow.FindControl("txtShipAdress")).Text;
//Prepare the Insert Command of the DataSource control
string strSQL = "";
strSQL = "INSERT INTO Orders (CustomerID, Freight, ShipName, " +
"ShipAddress) VALUES ('" + strCustomerID + "'," + float.Parse(strFreight) + ",'" +
strShipperName + "','" + strShipAdress + "')";
//AccessDataSource1.InsertCommand = strSQL;
//AccessDataSource1.Insert();
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('Order added successfully');</script>");
GridView1.DataBind();
}
catch (Exception ex)
{
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('" + ex.Message.ToString().Replace("'", "") + "');</script>");
}
}
}
protected void GridView2_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
gvEditIndex = e.NewEditIndex;
GridView1.DataBind();
}
protected void GridView2_CancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
gvEditIndex = -1;
GridView1.DataBind();
}
protected void GridView2_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
try
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
//Get the values stored in the text boxes
string strOrderID = ((Label)gvTemp.Rows[e.RowIndex].FindControl("lblOrderID")).Text;
string strFreight = ((TextBox)gvTemp.Rows[e.RowIndex].FindControl("txtFreight")).Text;
string strShipperName = ((TextBox)gvTemp.Rows[e.RowIndex].FindControl("txtShipperName")).Text;
string strShipAdress = ((TextBox)gvTemp.Rows[e.RowIndex].FindControl("txtShipAdress")).Text;
//Prepare the Update Command of the DataSource control
AccessDataSource dsTemp = new AccessDataSource();
dsTemp.DataFile = "App_Data/Northwind.mdb";
string strSQL = "";
strSQL = "UPDATE Orders set Freight = " + float.Parse(strFreight) + "" +
",ShipName = '" + strShipperName + "'" +
",ShipAddress = '" + strShipAdress + "'" +
" WHERE OrderID = " + strOrderID;
dsTemp.UpdateCommand = strSQL;
dsTemp.Update();
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('Order updated successfully');</script>");
//Reset Edit Index
gvEditIndex = -1;
GridView1.DataBind();
}
catch { }
}
protected void GridView2_RowUpdated(object sender, GridViewUpdatedEventArgs e)
{
//Check if there is any exception while deleting
if (e.Exception != null)
{
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('" + e.Exception.Message.ToString().Replace("'", "") + "');</script>");
e.ExceptionHandled = true;
}
}
protected void GridView2_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
//Get the value
string strOrderID = ((Label)gvTemp.Rows[e.RowIndex].FindControl("lblOrderID")).Text;
//Prepare the Update Command of the DataSource control
string strSQL = "";
try
{
strSQL = "DELETE from Orders WHERE OrderID = " + strOrderID;
AccessDataSource dsTemp = new AccessDataSource();
dsTemp.DataFile = "App_Data/Northwind.mdb";
dsTemp.DeleteCommand = strSQL;
dsTemp.Delete();
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('Order deleted successfully');</script>");
GridView1.DataBind();
}
catch { }
}
protected void GridView2_RowDeleted(object sender, GridViewDeletedEventArgs e)
{
//Check if there is any exception while deleting
if (e.Exception != null)
{
ClientScript.RegisterStartupScript(GetType(), "Message", "<SCRIPT LANGUAGE='javascript'>alert('" + e.Exception.Message.ToString().Replace("'", "") + "');</script>");
e.ExceptionHandled = true;
}
}
protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
//Check if this is our Blank Row being databound, if so make the row invisible
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (((DataRowView)e.Row.DataItem)["OrderID"].ToString() == String.Empty) e.Row.Visible = false;
}
}
protected void GridView2_Sorting(object sender, GridViewSortEventArgs e)
{
GridView gvTemp = (GridView)sender;
gvUniqueID = gvTemp.UniqueID;
gvSortExpr = e.SortExpression;
GridView1.DataBind();
}
#endregion
}
Заранее благодарим за ваше время.