c# - Defining Label.Text leads to a NullReferenceException -

-

I'm trying to set a label to show some text when an error occurs. 

  if (userEmail! = Null) {i // if exists in the same email pnlError.Visible = Visible; LblError.Text = "Error: The email you entered is already assigned to an account.";   
}  
 When I am creating, I do not get any error, which would suggest me to find it in the ASPX code.  
 P> Here's the markup:  
  & lt; Asp: panel id = "pnlError" runat = "server" visible = "incorrect" EnableViewState = "false" & gt; & Lt; Label id = "lblError" & gt; & Lt; / Labels & gt; & Lt; / ASP: Cell & gt;   
 As you can see it is wrapped in a panel. I can fix the visibility of the panel only in the same way as Label.Text  
 and here it is defined in aspx.designer.cs:  
  protected global :: system Web. UI. WebControl Panell PNLER; Protected global :: system. Web.UI.WebControls.Label lblError;   
 It is notable that whenever I change any other webcontroll element into markup, such as buttons or panels, aspx.design.cs reborn, but it failed to include lblError Remains label I tried to delete and then manually tried to rebuild the design manually.   
 
 
 As the label is within one panel, you need to find it:  
  if (userEmail! = Null) {// If the same email exists, then pnlError.Visible = Visible; Var lblError = ((label) (pnlError.FindControl ("lblError"))); If (lblError! = Null) {lblError.Text = "Error: The email you entered ..."; }}   
  Edit:   
 You can use better asp control  
  & lt; Asp: Label ID = "LblError" runat = "server" & gt; & Lt; / ASP: Labels & gt;   
 Then you do not need to find it  
  pnlError.Visible = Visible; LblError.Text = "Error: The email you entered ...";

Comments

Post a Comment

Popular posts from this blog

java - ImportError: No module named py4j.java_gateway -

-
I'm trying to call the Python using the Java program py4j . I've been installing the plug-in Eclipse and test name Piidvi project. I'm trying to execute the following part of the code found on py4j webpage: Import from py4j.java_gateway to JavaGateway, java_import gateway = JavaGateway () jvm = gateway.jvm java_import (jvm, '' Org.eclipse Kkorkrisorsej. * ") Vrkspes_rut = Jvankresourkesplginkgetvrkspas (). GetRoot (Gateway .help (workspace_root, '* Projects *') project_names = [project.getName () (for projects workpace_root.getProjects))] print (Projekt_nam) But I There is an error in import. I have checked that the P4JJ is present in the Jar Eclipse plugin directory. Can anyone help please? I had to install the py4j application
Read more

python - Receiving "KeyError" after decoding json result from url -

-
I am new to Python I am trying to parse JSON result from a URL. Basically, I was using the following: response = urllib.request.urlopen (url) json_obj = json.load (response) It should be a stroke "str 'not' bytes' in the lines of a given" JSON object, so after searching on the StackoverView Flo, I decode the response in this way: F = urllib.request.urlopen (Url) charset = f.info (). Get_param ('charset', 'utf8') data = f.read () decoded = json.loads (data.decode (charset)) If I print "decode" I is as follows: { 'link': { 'summary data': 'https: // localhost / piwebapi / streams / p0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / summary' 'value': 'https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / price ',' InterpolatedData ':' https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTE...
Read more

.net - Creating a new Queue Manager and Queue in Websphere MQ (using C#) -

-
"itemprop =" text "> I am writing applications that use WebSphere MQ to send messages. My unittests (for flow), I want to verify that I have put the correct message on the response queue. I am trying to figure out how to do this. My main obstacle is that I think it might be scary to clear the queue before running in my queue because the same queue can be used by other applications, I thought a decent solution would be a new line The manager will remove the queue for my solidarity and after using it. So my question is: Is it possible to use C # by using queue manager and queue? After the For future reference and future people, who want to make queues. I thought how to make and remove IBM MQ QE (not quenhers) with PCM messaging. It is not very simple, but it can be done. We have implemented it in a library and it is being used to create and delete commands before and after integration tests. The most important part of the code in this library is shown in the...
Read more