Application Page in SharePoint Model Dialog Box - Part II

Hi All,

In my previous post Application Page in SharePoint Model Dialog Box we have discussed the various issues i got from application pages. Here I am going to discuss how to deal with List Field settings in LFI (ListFieldIterator).

Scenario:
I have two fields (Title, Description) in my list; I want to add/update items to this list through application page, where I used ListFieldIterator. In LFI the Title field wants to be mandatory for a case and it does not mandatory for another case. I have used single application page for both cases. So I want to play with list field setting to achieve this. I tried with various approach, finally I decided to go with one of the following two ways.

Approach 1:

Get the title field and change the settings

Code snippet:

protected void Page_Init(object sender, EventArgs e)

        {

            using (SPSite osite = new SPSite(SPContext.Current.Site.ID))

            {

                using (SPWeb oweb = osite.OpenWeb())

                {

                    SPList olist = oweb.Lists.TryGetList("Job Aid Sections");

                    if (olist != null)

                    {

                        lfiUpdateJobAid.ListId = olist.ID;

   lfiUpdateJobAid.ControlMode = SPControlMode.New;

                        SPField oField = olist.Fields["Title"];

                        oField.Required = false;

   oweb.AllowUnsafeUpdates = true;

                        oField.Update();

                        oweb.AllowUnsafeUpdates = false;

                       

                    }

                }

            }

        }

Note: In this approach we have changed the list settings. There are changes to access multiple users concurrently.  So it leads the application to execute inconsistently. Refer Approach 2 for alternative

Approach 2:

protected void Page_Init(object sender, EventArgs e)

        {

            using (SPSite osite = new SPSite(SPContext.Current.Site.ID))

            {

                using (SPWeb oweb = osite.OpenWeb())

                {

                    SPList olist = oweb.Lists.TryGetList("Job Aid Sections");

                    if (olist != null)

                    {

                        lfiUpdateJobAid.ListId = olist.ID;

   lfiUpdateJobAid.ControlMode = SPControlMode.New;

                        lfiUpdateJobAid.Fields["Title"].Required = false;

                        lfiUpdateJobAid.Fields[""].ReadOnlyField = true;

                        lfiUpdateJobAid.ExcludeFields = "Title;#IsDeleted;#DisplayOrder";

                    }

                }

            }

        }

Note: This approach does not change the list settings.

Complete code:

Ascx

<script type="text/javascript"">

     function fnOpenUpdateSection(queryString, title, oldJobAidStatusID, jobAidID) {

         addSectionUri = "/_layouts/LisFiedIteratorResize/LFIApplPage.aspx";

         var options = { url: addSectionUri, width: 0, height: 0, showMaximized: true, title: "Test Page" };

         SP.UI.ModalDialog.showModalDialog(options);

         return false;

     }

 </script>

 <asp:Button ID="btnTest" runat="server" Text="Click" />

Ascx.cs

protected void Page_Load(object sender, EventArgs e)

        {

            btnTest.Attributes.Add("onclick", "javascript:return fnOpenUpdateSection()");

        }

        protected void btnTest_Click(object sender, EventArgs e)

        {

            //Response.Redirect("");

        }

Aspx

<asp:Content ID="PageHead" ContentPlaceHolderID="PlaceHolderAdditionalPageHead" runat="server">

<style type="text/css">

    .ms-long

    {

        width:50%;

    }

</style>

</asp:Content>

<asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server">

<table id="tblUpdateScript" runat="server" cellpadding="0" cellspacing="0" width="100%">

        <tr>

            <td>

                <SharePoint:ListFieldIterator ID="lfiUpdateJobAid" runat="server" ControlMode="New">

                </SharePoint:ListFieldIterator>

            </td>

        </tr>

        <tr id="trFileUpload" runat="server">

            <td valign="top">

               <asp:Label ID="lblAttachments" runat="server" CssClass="labelAttachment">Attachments</asp:Label>

            </td>

            <td>

                <asp:FileUpload ID="fuSectionAttachment" runat="server" />&nbsp;

                <asp:Label ID="lblAttach1Error" runat="server" CssClass="labelAttachmentError"></asp:Label><br />

                <asp:FileUpload ID="fuSectionAttachment1" runat="server" />&nbsp;

                <asp:Label ID="lblAttach2Error" runat="server" CssClass="labelAttachmentError"></asp:Label><br />

                <asp:FileUpload ID="fuSectionAttachment2" runat="server" />&nbsp;

                <asp:Label ID="lblAttach3Error" runat="server" CssClass="labelAttachmentError"></asp:Label>                               

            </td>      

        </tr>

        <tr>

            <td>

                &nbsp;

            </td>

        </tr>

        <tr>

            <td valign="top" colspan="2">

                <asp:LinkButton ID="lbnSave" CommandName="Save" runat="server" OnClick="btnSave_Click">

                    <img id="Img1" src="/Style%20Library/images/save.png" align="absMiddle" runat="server"

                        alt="Save" />

                </asp:LinkButton>&nbsp;&nbsp;               

                    <img id="Img2" src="/Style%20Library/images/cancel.png" align="absMiddle" runat="server"

                        alt="Cancel" onclick="javascript:SP.UI.ModalDialog.commonModalDialogClose(SP.UI.DialogResult.cancel, 'Cancelled clicked');" />               

            </td>

        </tr>

        <tr>

            <td valign="top" colspan="2">

                <asp:Label ID="lblErrorMessage" runat="server"></asp:Label>

            </td>

        </tr>

    </table>

</asp:Content>

Aspx.cs

protected void Page_Init(object sender, EventArgs e)

        {

            using (SPSite osite = new SPSite(SPContext.Current.Site.ID))

            {

                using (SPWeb oweb = osite.OpenWeb())

                {

                    SPList olist = oweb.Lists.TryGetList("Job Aid Sections");

                    if (olist != null)

                    {

                        lfiUpdateJobAid.ListId = olist.ID;

                        lfiUpdateJobAid.ControlMode = SPControlMode.New;

                        lfiUpdateJobAid.ExcludeFields = "Title;#IsDeleted;#DisplayOrder";

                      

                        // Approach 1

                        SPField oField = olist.Fields["Title"];

                        oField.Required = false;

                        oweb.AllowUnsafeUpdates = true;

                        oField.Update();

                        oweb.AllowUnsafeUpdates = false;

                        //Approach 2

                        lfiUpdateJobAid.Fields["Title"].Required = false;

                        lfiUpdateJobAid.Fields[""].ReadOnlyField = true;

                       

                    }

                }

            }

        }

        protected void Page_Load(object sender, EventArgs e)

        {

            lbnSave.Click += new EventHandler(btnSave_Click);

        }

        protected void btnSave_Click(object sender, EventArgs e)

        {

            //if (Page.IsValid)

            //{

                BaseFieldControl fieldControl = GetFieldControlByName("Section Content");

                if (Convert.ToString(fieldControl.Value.ToString().Trim()) == string.Empty)

                {

                    fieldControl.ErrorMessage = " ";

                    fieldControl.IsValid = false;

                }

                else

                {

                    lfiUpdateJobAid.ListItem["JobAidID"] = 1;

                    lfiUpdateJobAid.ListItem["SectionType"] = 0;

                    lfiUpdateJobAid.ListItem["IsDeleted"] = 0;

                    lfiUpdateJobAid.Web.AllowUnsafeUpdates = true;

                    lfiUpdateJobAid.ListItem.Update();

                    lfiUpdateJobAid.Web.AllowUnsafeUpdates = false;

                    Response.Write("<script language='javascript'>window.parent.location.href = window.parent.location.href</script>");

                }

            //}

        }

        protected BaseFieldControl GetFieldControlByName(String fieldNameToFind)

        {

            BaseFieldControl baseField = null;

            foreach (Control control in Page.Validators)

            {

                if (control is BaseFieldControl)

                {

                    baseField = control as BaseFieldControl;

                    String fieldName = baseField.FieldName;

                    if ((fieldName == fieldNameToFind))

                    {

                        return baseField;

                    }

                }

            }

            return baseField;

        }