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I'm a Worm Bug ;)

I'm having a lot of problems with the gridview bind. I have a dataset that represents a table of a database. When I delete or insert a row in the gridview I have the data well inserted or deleted in the db but the gridview duplicates the rows when postbacks the page and i can't understand why. Can someone help me? Code aspx.cs: protected void Page_Load(object sender, EventArgs e) { dbHandler = new WalletManagerDBSqlSrvHandler(DB_SERVER); shoptype_grid.DataSource = dbHandler.getShopTypes().Tables["ShopType"]; if (!Page.IsPostBack) { shoptype_grid.DataBind(); } formatShopTypeGrid(); } //eventhandler when a row is inserted protected void onClickInsertShopType(object sender, EventArgs e) { DataTable dtable = dbHandler.getShopTypes().Tables["ShopType"]; DataRow dataRow = dtable.NewRow(); dataRow["ID"] = DateTime.UtcNow.Ticks; /*Generates the ID of the inserted item threw the date and time tick*/ dataRow["Type"] = shopType_txtbox.Text; dtable.Rows.Add(dataRow); dbHandler.updateShopType(DatabaseOperation.Insert); shoptype_grid.DataBind(); } //eventhandler when a row is deleted protected void shoptype_grid_RowDeleting(object sender, GridViewDeleteEventArgs e) { DataTable dtable = dbHandler.getShopTypes().Tables["ShopType"]; DataRow drow = dtable.Rows[e.RowIndex]; drow.Delete(); //row erased dbHandler.updateShopType(DatabaseOperation.Delete); shoptype_grid.DataBind(); }

I'm a Worm Bug ;)