Pass c# property to HTML which changes the HREF

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I have created a property in my C# file which I use to update the Text of my Headers. I also, placed this in my HREF to update my links however it does not update them. I initially thought the Page_Load event was not firing before this property was updated but not sure. I placed <%=this.Discipline %> in my HREF and it does not update, yet it updates the text. Please help!

Here is my property Discipline which i set based on the ?QueryString:

C#

public string Discipline
		{
			get;
			set;
		}

Here is the Page_Load event where I update my Discipline

C#

/// <summary>
/// </summary>
/// <param name="sender">The object that raised the event.</param>
/// <param name="e">The EventArgs for this event.</param>
protected void Page_Load(object sender, EventArgs e)
{
	if(Request.QueryString.Count > 0)
	{
		foreach(string key in Request.QueryString.AllKeys)
		{
			string value = Request.QueryString[key];

			if(!string.IsNullOrEmpty(value))
			{
				if(key.ToLower() == "discipline")
				{
					if(value == "Cardiology")
					{
						this.Discipline = "Cardiology";
					}
					if(value == "Chiropractic")
					{
						this.Discipline = "Chiropractic";
					}
					if(value == "Dermatology")
					{
						this.Discipline = "Dermatology";
					}
					if(value == "Family")
					{
						this.Discipline = "Family";
					}
					if(value == "Internal")
					{
                                                this.Discipline = "Internal";
					}
					if(value == "Urgent")
					{
						this.Discipline = "Urgent Care";
					}
					
				}
                        }
                 }
          }
}

Here is my atag where the HREF does not update and the H1 tag does.

ASP.NET

                                <a  runat="server" id="a_Overview" class="ContentSideBar" style="vertical-align: middle;" href="/Products/Specialty.aspx?discipline=<%=this.Discipline %>&content=Overview">
                                   <img  runat="server" id="img_Overview" class="MenuIcons" src="/Images/Icons/Categoryblue.png" alt="Specialty" />
                                   <span  runat="server" id="span_Overview" class="MenuHeader">Specialty Overview</span>
                                   <img  runat="server" id="arrow_Overview" class="MenuArrow" alt="menuArrow" src="/Images/Icons/RightArrowwhite.png" />
                               </a>


<h1 class="SpecialtyHeader"><%=this.Discipline %>
               <span class="SpecialtyHeader">EHR</span>
               <%--<span class="SpecialtySubHeader">Electronic Health Record</span>--%>
           </h1>

Posted 25-Nov-13 7:56am

andrewster05

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Comments

ZurdoDev 25-Nov-13 14:38pm

Do it in C#

andrewster05 25-Nov-13 15:15pm

I can change it in C# but that means I have to reference 30 links on several pages to updated manually vs. just setting this dynamically. I want to know if this just doesn't work in HREF? It is working in the text.

ZurdoDev 25-Nov-13 15:36pm

I think it does but if I recall you have to use EVAL and concatenate your strings together. It seems like I did it years ago but don't quite recall. That's why when I have issues like this I just do it in C#, much easier. :)

footballpardeep 25-Nov-13 15:13pm

Use Hyperlink

3 solutions

Solution 2

You may refer to the question below. It suggested enclosing the whole attribute in a <% %> and then do the necessary concatenation.

http://stackoverflow.com/questions/3434744/using-databinder-eval-in-style-attribute-of-an-asp-net-control[^]

Posted 25-Nov-13 16:38pm

walterhevedeich

Solution 1

add

C#

using System.Web.UI.HtmlControls;

C#

HtmlAnchor a1 = link1;
        a1.HRef = "www.mySite.com/mypage.aspx";

Posted 25-Nov-13 9:18am

footballpardeep

Updated 25-Nov-13 9:20am

v2

Comments

andrewster05 25-Nov-13 17:29pm

Sorry, I know I can change the HREF manually in code. I want to understand why properties are not updated in the HREF or if I am doing this incorrectly. If I can get <%= this.Discipline %> to work in my HTML it will save alot of work effort and ongoing maintenance. Thanks,

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Karthik_Mahalingam · Accepted Answer · 2013-11-25T16:58:00

Hi dude,
Try like this..

XML

<div id="divContainer" runat="server">



            <asp:HyperLink ID="aa1" runat="server" Text="asp tag" NavigateUrl="<%# this.Discipline %>">
            </asp:HyperLink>
            <br />

            <h1 class="SpecialtyHeader"><%=this.Discipline %>
                <span class="SpecialtyHeader">EHR</span>
                <%--<span class="SpecialtySubHeader">Electronic Health Record</span>--%>
            </h1>
            <br />

            <a runat="server" id="a_Overview" class="ContentSideBar" style="vertical-align: middle;" href='<%# string.Format("/Products/Specialty.aspx?discipline={0}&content=Overview", this.Discipline) %>'>
                <img runat="server" id="img_Overview" class="MenuIcons" src="/Images/Icons/Categoryblue.png" alt="Specialty" />
                <span runat="server" id="span_Overview" class="MenuHeader">Specialty Overview</span>
                <img runat="server" id="arrow_Overview" class="MenuArrow" alt="menuArrow" src="/Images/Icons/RightArrowwhite.png" />
            </a>


            <br />
            <br />
            <asp:HyperLink ID="HyperLink1" runat="server" Text="last tag" NavigateUrl='<%# string.Format("testinglink.aspx?query={0}", this.Discipline) %>'>


            </asp:HyperLink>

        </div>

C#

public string Discipline
       {
           get;
           set;
       }

       protected void Page_Load(object sender, EventArgs e)
       {
           if (Page.IsPostBack) { }
           else
           {
               Discipline = "Cardiology";
               divContainer.DataBind();

           }
       }

Note:
What you have to do is, u have to place all the controls in a container control
and after setting the desired property in cs file. you have to bind the container control by calling databind function

C#

divContainer.DataBind();

you can check the code for formatting the url to frame the query strings