An example of “how to create a consumer webpart”.
Description: This webpart can be connected to a list or a library webpart. The selected item in the provider webpart will be shown in an iframe.
Custom Settings: Define if the webpart consumes from a library or a list webpart.
Screenshot:
Custom Webpart Setting:
Project Structure
Code FileViewerConsumerWebpart.cs
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using System; using System.ComponentModel; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using Microsoft.SharePoint; using Microsoft.SharePoint.WebControls; using System.Data; namespace SPLoupe.FilePreviewConsumer.FileViewerConsumerWebpart { [ToolboxItemAttribute(false)] public class FileViewerConsumerWebpart : WebPart { public static string FileToShow { get; set; } public enum ProviderWebpartChoice { Library, List } [WebBrowsable(true), WebDisplayName("Provider Webpart:"), Category("Custom Settings"), Personalizable(PersonalizationScope.Shared), Description("Choose if you connect this webpart from a list or a library"),] public ProviderWebpartChoice ProviderType { get; set; } private IWebPartRow _myProvider; private DataRowView _DataRow; LiteralControl iframe = new LiteralControl("<iframe id='iframe' runat='server' src=" + FileToShow + "' style='width: 100%; height: 90%;'></iframe>"); [ConnectionConsumer("Row")] public void SetConnectionInterface(IWebPartRow provider) { _myProvider = provider; } public void GetRowData(object rowData) { EnsureChildControls(); _DataRow = (DataRowView)rowData; if (ProviderType == ProviderWebpartChoice.Library) { using (SPSite site = new SPSite(SPContext.Current.Web.Url)) { using (SPWeb web = site.OpenWeb()) { try { if (_DataRow["ContentType"].ToString() != "Folder" && _DataRow["ContentType"].ToString() != "Ordner") { FileToShow = _DataRow["DocUrl"].ToString(); /*findout the property names foreach (DataColumn v in _DataRow.Row.Table.Columns) { FileToShow = FileToShow+"\nCollumnsValue: " + v.ToString(); }*/ } else { FileToShow = string.Empty; } } catch (Exception) { } } } } else if (ProviderType == ProviderWebpartChoice.List) { try { FileToShow = _DataRow["URL"].ToString().Substring(0, _DataRow["URL"].ToString().IndexOf(',')); } catch (Exception) { } } //Show FileToShow //LiteralControl LabelPath = new LiteralControl(); //LabelPath.Text = "FileToShow URL = " + FileToShow; //Controls.Add(LabelPath); iframe.Text = "<iframe id='iframe' runat='server' src='" + FileToShow + "' style='width: 100%; height: 90%;'></iframe>"; Controls.Add(iframe); } protected override void OnPreRender(EventArgs e) { base.OnPreRender(e); if (_myProvider != null) { _myProvider.GetRowData(new RowCallback(GetRowData)); } } protected override void CreateChildControls() { } } } |