How to implement Ajaxified details view hide on PageIndexChanging

Previously I showed how to enable DetailsView with a Select button (link). But here is how to get rid of the DetailsView if Paging is enabled by using the PageIndexChanging method.

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        // get rid of the details view
        DetailsView1.DataSource = null;
        DetailsView1.DataBind();

        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataBind();
    }

To Ajaxify it within an update panel, add a Trigger for the Gridview1 object and the PageIndexChanging event.

Generate Random numbers

Here's a quick one on how to generate random numbers. link

Random rnd = new Random();
int myRandom = rnd.Next();

Implementing Dynamic Hyperlink of Current Page

Here's how to implement a dynamic HyperLink of the current page based on the current pages title and current URL without the query string parameters. This is located in the Master Page.

    protected void Page_Load(object sender, EventArgs e)
    {
        hlPageTitle.Text = Page.Title.ToString();
        // old way would fetch query string paramaters
        //hlPageTitle.NavigateUrl = Request.Url.AbsoluteUri.ToString();
        hlPageTitle.NavigateUrl = Request.Url.GetLeftPart(UriPartial.Path);
    }

Reference link.

Fixing WebForms.PageRequestManagerServerErrorException Status code 500

Here's a fix for the error WebForms.PageRequestManagerServerErrorException Status code 500.
I modified the MasterPage's ScriptManager as follows:

                    <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="false">
                    </asp:ScriptManager>

UPDATE: This might fix the error, but it limits the functionality by not allowing Partial Page Rendering. This may not be acceptable. Here is a hint to avoid breaking the AJAX:

Hint: Be careful when changing Control names. The IDE won't catch the name change in the Extenders section of the TargetControlID.

How to implement Select on a GridView1 with Paging enabled.

How to implement Select on a GridView1 with Paging enabled based on a DataTable.

    protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
    {
        // e.NewSelectedIndex -> 0 to n
        // GridView1.PageCount -> (n-1) always 
        // GridView1.PageIndex -> 0 to Page#
        int rowN = 1 + ((GridView1.PageCount-1) * GridView1.PageIndex + e.NewSelectedIndex);
        DetailsView1.HeaderText = "Details View of Row "+ rowN.ToString();
        DetailsView1.PageIndex = rowN - 1;
        GridView1.SelectedIndex = rowN - 1;
        DetailsView1.DataSource = Cache["dt"];        
        DetailsView1.DataBind();
    }

How to enable paging on a GridView that is bound to a DataTable.

How to enable paging on a GridView that is bound to a DataTable. On the GridView, simply

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataSource = Cache["dt"];
        GridView1.DataBind();
    }

link

Using Yahoo Mail Web Service hints

This should help you use Yahoo Mail Web Service for C# .NET.
First, go to link and download code sample for C#.
Second, use the APIs at link. I prefer the html link.
Third, get an application id at link. Be sure that this is the destination page where you will acquire the credentials using Request.QueryString[xTag].
Fourth, the above doesn't really explain a detail that will let the Web Service actually return Messages. Make sure that the xTagIsSpecified boolean is set before the request!
NOTE: The code sample below only works with premium accounts. Accounts link.

                // <ListMessages>                
                // ListMessages, lists the messages in a given folder.
                ListMessages listRequest = new ListMessages();
                listRequest.fid = "Inbox";
                listRequest.startMid = 0;
                listRequest.startInfo = 0;
                listRequest.numMid = 10;
                listRequest.numInfo = 1;
                listRequest.startMidSpecified = true;
                listRequest.startInfoSpecified = true;
                listRequest.numMidSpecified = true;
                listRequest.numInfoSpecified = true;
                ListMessagesResponse listResponse = ymwsInstance.ListMessages(listRequest);
                retVal += string.Format("<br />Listed folder <b>{0}</b>, found <b>{1}</b> message IDs.<br />",
                    listResponse.folder.folderInfo.name, listResponse.mid.Length);
                string[] listedMed = ymwsInstance.ListMessages(listRequest).mid;                
                // </ListMessages>

Well documented C# code sample

Well documented C# code sample demonstrates region, summary, and parameter documentation.

#region well documented sample method sample    
        /// <summary>
        /// Saves the form size when it is resized.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void SampleBrowser_SizeChanged(object sender, EventArgs e)
        {
            Properties.Settings.Default.FormClientSize = this.ClientSize;
        }

        /// <summary>
        /// Saves all settings when form is closed.
        /// </summary>
#endregion

Note: In addition to "param", one can use:

    /// <returns>State of log in</returns>

Also: The #endregion must be on a new line!

Caching Methods in ASP.NET 2.0

How To Cache

Method	Implementation	Sample uses
Programatic Caching	Set: Cache.Insert("UniqueKey", myData, null, DateTime.Now.AddMinutes(5), System.Web.Caching.Cache.NoSlidingExpiration); Get: Cache["UniqueKey"].ToString();
Session State Caching	Set: Session.Add("UniqueKey", myData); Get: Session["UniqueKey"];
Caching to Disk	Application Cache Block
Caching to Database	CodeProject Article

link

Modifying labels in MasterPage From MasterPage user Page

First, here is how to modify a label in the MasterPage from the MasterPage user Page:

        Label mpLabel = (Label)Master.FindControl("lblPageTitle");
        if (mpLabel != null)
        {
            mpLabel.Text = this.Title.ToString();
        }

link

Setup an email form for .NET 2.0

Here is how I setup the email action for .NET 2.0. I included "using System.Net.Mail;" and "using System.Net;"

        string sTo = "foo@foo.com";
        string sFrom = txtFrom.Text.Trim();
        string sSubject = "inforequest message" + DateTime.Now.ToLongDateString();
        string sBody = txtContent.Text.Trim();
        lblStatus.Text = "Sending... please wait";
        MailMessage msg = new MailMessage(sFrom, sTo, sSubject, sBody);
        msg.IsBodyHtml = false;
        SmtpClient mailObj = new SmtpClient("mail.foo.com");
        mailObj.Credentials = new NetworkCredential("user", "secret"); 
        mailObj.Send(msg);
        lblStatus.Text = "Sent " + msg.Subject + " to " + msg.To;

references: link
Note: I used "localHost" instead of "mail.foo.com".