/BlogEngine/BlogEngine.NET/admin/Posts/Categories.aspx.cs

#region Using



using System;

using System.Web.UI.WebControls;

using BlogEngine.Core;

using App_Code;



#endregion



namespace Admin.Posts

{

    public partial class Categories : System.Web.UI.Page

    {

        /// <summary>

        /// Handles the Load event of the Page control.

        /// </summary>

        /// <param name="sender">The source of the event.</param>

        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>

        protected void Page_Load(object sender, EventArgs e)

        {

            WebUtils.CheckRightsForAdminPostPages(false);



            if (!Page.IsPostBack)

            {

                BindGrid();



                LoadParentDropDown(ddlNewParent, null);

            }



            grid.RowEditing += new GridViewEditEventHandler(grid_RowEditing);

            grid.RowUpdating += new GridViewUpdateEventHandler(grid_RowUpdating);

            grid.RowCancelingEdit += delegate { Response.Redirect(Request.RawUrl); };

            grid.RowDeleting += new GridViewDeleteEventHandler(grid_RowDeleting);

            grid.RowDataBound += new GridViewRowEventHandler(grid_RowDataBound);

            btnAdd.Click += new EventHandler(btnAdd_Click);

            btnAdd.Text = Resources.labels.add + " " + Resources.labels.category.ToLowerInvariant();

            valExist.ServerValidate += new ServerValidateEventHandler(valExist_ServerValidate);

            Page.Title = Resources.labels.categories;

        }



        void grid_RowDataBound(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowState == DataControlRowState.Edit ||

                    e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit))

            {

                Category self = (Category)e.Row.DataItem;

                DropDownList ddlParent = (DropDownList)e.Row.FindControl("ddlParent");

                LoadParentDropDown(ddlParent, self);



                Category temp = (Category)e.Row.DataItem;

                if (temp.Parent != null)

                {

                    foreach (ListItem item in ddlParent.Items)

                    {

                        if (item.Value == temp.Parent.ToString())

                        {

                            item.Selected = true;

                            break;

                        }

                    }

                }

            }

        }



        private void LoadParentDropDown(DropDownList ddl, Category self)

        {

            // Load up the Parent DropDown

            ddl.ClearSelection();

            ddl.Items.Add(new ListItem("none", "0"));

            foreach (Category cat in Category.Categories)

            {

                if (self == null || !cat.Id.Equals(self.Id))

                    ddl.Items.Add(new ListItem(cat.CompleteTitle(), cat.Id.ToString()));

            }

        }



        /// <summary>

        /// Handles the ServerValidate event of the valExist control.

        /// </summary>

        /// <param name="source">The source of the event.</param>

        /// <param name="args">The <see cref="System.Web.UI.WebControls.ServerValidateEventArgs"/> instance containing the event data.</param>

        private void valExist_ServerValidate(object source, ServerValidateEventArgs args)

        {

            args.IsValid = true;



            foreach (Category category in Category.Categories)

            {

                if (category.Title.Equals(txtNewCategory.Text.Trim(), StringComparison.OrdinalIgnoreCase))

                    args.IsValid = false;

            }

        }



        /// <summary>

        /// Handles the Click event of the btnAdd control.

        /// </summary>

        /// <param name="sender">The source of the event.</param>

        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>

        void btnAdd_Click(object sender, EventArgs e)

        {

            if (Page.IsValid)

            {

                string description = txtNewNewDescription.Text;

                if (description.Length > 255)

                    description = description.Substring(0, 255);



                Category cat = new Category(txtNewCategory.Text, description);

                if (ddlNewParent.SelectedValue != "0")

                    cat.Parent = new Guid(ddlNewParent.SelectedValue);



                cat.Save();

                Response.Redirect(Request.RawUrl, true);

            }

        }



        /// <summary>

        /// Handles the RowDeleting event of the grid control.

        /// </summary>

        /// <param name="sender">The source of the event.</param>

        /// <param name="e">The <see cref="System.Web.UI.WebControls.GridViewDeleteEventArgs"/> instance containing the event data.</param>

        void grid_RowDeleting(object sender, GridViewDeleteEventArgs e)

        {

            Guid id = (Guid)grid.DataKeys[e.RowIndex].Value;

            Category cat = Category.GetCategory(id);



            // Removes all references to the category

            foreach (Post post in Post.Posts)

            {

                if (post.Categories.Contains(cat))

                {

                    post.Categories.Remove(cat);

                }

            }



            cat.Delete();

            cat.Save();

            Response.Redirect(Request.RawUrl);

        }



        /// <summary>

        /// Handles the RowUpdating event of the grid control.

        /// </summary>

        /// <param name="sender">The source of the event.</param>

        /// <param name="e">The <see cref="System.Web.UI.WebControls.GridViewUpdateEventArgs"/> instance containing the event data.</param>

        void grid_RowUpdating(object sender, GridViewUpdateEventArgs e)

        {

            Guid id = (Guid)grid.DataKeys[e.RowIndex].Value;

            TextBox textboxTitle = (TextBox)grid.Rows[e.RowIndex].FindControl("txtTitle");

            TextBox textboxDescription = (TextBox)grid.Rows[e.RowIndex].FindControl("txtDescription");

            DropDownList ddlParent = (DropDownList)grid.Rows[e.RowIndex].FindControl("ddlParent");

            Category cat = Category.GetCategory(id);

            cat.Title = textboxTitle.Text;

            cat.Description = textboxDescription.Text;

            if (ddlParent.SelectedValue == "0")

                cat.Parent = null;

            else

                cat.Parent = new Guid(ddlParent.SelectedValue);

            cat.Save();



            Response.Redirect(Request.RawUrl);

        }



        /// <summary>

        /// Handles the RowEditing event of the grid control.

        /// </summary>

        /// <param name="sender">The source of the event.</param>

        /// <param name="e">The <see cref="System.Web.UI.WebControls.GridViewEditEventArgs"/> instance containing the event data.</param>

        void grid_RowEditing(object sender, GridViewEditEventArgs e)

        {

            grid.EditIndex = e.NewEditIndex;

            BindGrid();

        }



        /// <summary>

        /// Binds the grid with all the categories.

        /// </summary>

        private void BindGrid()

        {

            grid.DataKeyNames = new string[] { "Id" };

            grid.DataSource = Category.Categories;

            grid.DataBind();

        }



        protected string GetParentTitle(object item)

        {

            Category temp = (Category)item;

            if (temp.Parent == null)

                return "";

            else

                return Category.GetCategory((Guid)temp.Parent).Title;

        }

    }

}