how to display value

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Hello , first sory my poor english. In my project ı have been trying to display value from code behing but ı get this mesage even ı have checked the variable is null or not

Compiler Error Message: CS0201: Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

HTML

<br />

                         <div class="prod_price_big"><span class="reduce">350$</span>&lt;%if (Price != null) { %&gt; &lt;% Price;
                                                                                       }%&gt; <span>

and my code behind is

C#

public Users user
      {
          get { return Session["user"] as Users; }
          set { Session["user"] = value; }
      }

      ShipperResposite _shiperResposite = new ShipperResposite();
      decimal Pricee;
      public decimal Price
      {
          get { return Price; }
          set
          {
              value = Pricee;
              Price = value;
          }
      }

      protected void Page_Load(object sender, EventArgs e)
      {
          if (user == null)
              Response.Redirect("~/Default.aspx", true);
          if(Price==null)
              Response.Redirect("~/Default.aspx", true);

          DropDownList1.DataSource = _shiperResposite.ListShippers().ToList();
          DropDownList1.DataTextField = "CompanyName";
          DropDownList1.DataValueField = "ID";
          DropDownList1.DataBind();
          Pricee = _shiperResposite.GetPriceFromID(Convert.ToInt32(Request.QueryString["ID"]));

      }


      }
  }</span></div>

Posted 1-Jan-13 15:52pm

burak88

Updated 1-Jan-13 16:01pm

Sergey Alexandrovich Kryukov

v3

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Comments

Sergey Alexandrovich Kryukov 1-Jan-13 22:00pm

Can you format the code properly? I added "pre" tags, you will see it if you click "Improve question", but please fix it properly.
—SA

Sergey Alexandrovich Kryukov 1-Jan-13 22:02pm

In what line do you have this error?
—SA

Christian Graus 1-Jan-13 23:14pm

Isn't it obvious ?

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Christian Graus · Answer 1 · 2013-01-01T17:16:00

Your code translates to this :

C#

if (Price != null) { %><% Price; }

Price is a variable, and you're using it as an expression. I would suggest making Price a property that never returns null, and replacing all of this with =Price. The alternative is to replace Price with Response.Write(Price), Price by itself is not a statement to output that variable, and it has no value, and creates the error ( which is NOT a null reference, that's why it doesn't say 'null' anywhere ).

The two code blocks are also messing you up. Get rid of the middle ones, the ones I quoted.

burak88 · Answer 2 · 2013-01-02T12:51:00

CSS

}

    ı have revize my code like this 

 public decimal Price
        {
            get { return Price; }
            set
            {
                Price=_shiperResposite.GetPriceFromID(Convert.ToInt32(Request.QueryString["ID"]));
                Price = value;
            }
        }



 

and ı have changed my code like this at html side

 <div class="prod_price_big">350$<![CDATA[<%=Price %>]]> </div>

this code block give me this eror mesage "An unhandled exception of type 'System.StackOverflowException' occurred in WebApplication34.dll" 
ı think it is about wrong using of my property ı created o method which  give me a variable which ı need . I can see this variable in debug mode but ı could not trensfer it to html side. Sory for my poor knowledge ı am new at programing thanks for helps

rizwan muhammed khan gouri · Answer 3 · 2013-01-04T23:40:00

Solution 3

You can used like classic asp

1

C#

<%
if (Price != null) { Response.write(Price); }
%>

and
2.

C#

<%
if (Price != null) {%> <%=Price%><% }
%>

3.

C#

<%=((Price != null)?Price:0)%>

I hope your problem will solve if not please give your comments

Posted 4-Jan-13 23:40pm

rizwan muhammed khan gouri

how to display value

3 solutions

Solution 1

Solution 2

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