Web Forms :: Get A Error CS0103 For Every Item On The Page ?
Dec 22, 2010
This error is baffling me. My webpage was working fine up until I added a label for testing to the page. Now when I try to debug the page, I get a error CS0103 for every item on my page that I try to reference in my "behind" code.
The .aspx page:
[Code]....
My errors are as follows:Error 1 An object reference is required for the non-static field, method, or property 'System.Web.UI.Control.Visible.get' 23 5 TRX-Support
Error 2 The name 'LoginRoundPanel' does not exist in the current context 24 5 TRX-Support
I have tried deleting the designer and convering the page back to a web application, and this didn't help. I'm fairly new to ASP.NET & C#
I'm a beginner at this, sorry if I get the terminology wrong. I'm using Visual Web Developer 2010 Express with C# 2008 and .NET v4.0 to create a website which will have a database application.
I have a SQL Server table which contains some bit fields (FruitsEarlySpring etc). When I linked this to a GridView with SELECT only defined, the bit fields were displaying as greyed-out checkboxes. To replace these with something more attractive I used Item Templates with Labels instead of the Checkboxes with custom binding e.g. Tick(Eval("FruitsEarlySpring")) and this logic in the code-behind file:
[Code]....
The label text font family is set to Webdings so that the "a" displays as a tick (a 'check'?), and this works very well.
My problem is, I have a separate page which displays the same fields using a FormView and I want to display them the same way, referring to the same logic, but I can't seem to access the method. I get runtime error CS0120, "An object reference is required for the non-static field, method, or property 'APR2.Fungi.Tick(object)'
line Line 338: <asp:Label ID="EarSprLab" runat="server" Font-Names="Webdings"
Line 339: Text='<%# APR2.Fungi.Tick(Eval("FruitsEarlySpring")) %>'></asp:Label>
Before this I tried not qualifiying the method name and got error message CS0103, "The name 'Tick' does not exist in the current context". The code-behind files occupy the same namespace, and the class and method are now both public so I don't think it's a scope problem. I have searched this forum for similar problems and no, I don't have two master pages, or a duplicate set of files.
I am working on a contact form. i am getting an error below, here is my code:
[Code]....
And here is the error i'm getting:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0103: The name 'txtEmail' does not exist in the current contextSource
Error:
[Code]....
Line 20: try Line 21: { Line 22: MailAddress fromAddress = new MailAddress(txtEmail.Text, txtFirstName.Text + " " + txtLastName.Text); Line 23: Line 24: // You can specify the host name or ipaddress of your server Source File: c:HostingSpacesartofmouldingartofmoulding.comwwwrootcontact.aspx.cs Line: 22
I have created a simple ASP.NET Website in Visual Studio 2008. I have a static C# class (lets call it someClass) contained in a separate file in the App_Code folder. I call a method from that class in my page's code behind like so:
someVar = someClass.someMethod(someParam);
This compiles correctly in VS 2008 but when I move it over to my IIS server, I get the following error (CS0103): Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0103: The name 'someClass' does not exist in the current context I have created a virtual directory for this website enabling 'Read', 'Run scripts (such ASP)', and 'Execute (such as ISAPI applications or CGI)'. I am not currently utilizing namespaces (as I thought I would not need to and I'm not sure how to use them properly). What am I doing wrong?
CS0103: The name 'lblRegion' does not exist in the current context
Source Error:
[Code]....
Line 31: {Line 32: Line 33: lblRegion.Text = dt.Rows[0]["RegionName"].ToString();Line 34: lblCountry.Text = dt.Rows[0]["CountryName"].ToString();Line 35: lblCountryCode.Text = dt.Rows[0]["CountryCode"].ToString();
this is source code: using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Net; using System.Xml; public partial class CSharp : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //Get IP Address string ipaddress; ipaddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (ipaddress == "" || ipaddress == null) ipaddress = Request.ServerVariables["REMOTE_ADDR"]; DataTable dt = GetLocation(ipaddress); if (dt != null) { if (dt.Rows.Count > 0) { lblCity.Text = dt.Rows[0]["City"].ToString(); lblRegion.Text = dt.Rows[0]["RegionName"].ToString(); lblCountry.Text = dt.Rows[0]["CountryName"].ToString(); lblCountryCode.Text = dt.Rows[0]["CountryCode"].ToString(); } else { } } } private DataTable GetLocation(string ipaddress) { //Create a WebRequest WebRequest rssReq = WebRequest.Create("[URL]xml/" + ipaddress); //Create a Proxy WebProxy px = new WebProxy("[URL]+ ipaddress, true); //Assign the proxy to the WebRequest rssReq.Proxy = px; //Set the timeout in Seconds for the WebRequest rssReq.Timeout = 2000; try { //Get the WebResponse WebResponse rep = rssReq.GetResponse(); //Read the Response in a XMLTextReader XmlTextReader xtr = new XmlTextReader(rep.GetResponseStream()); //Create a new DataSet DataSet ds = new DataSet(); //Read the Response into the DataSet ds.ReadXml(xtr); return ds.Tables[0]; } catch { return null; } } }
all elements are in an updatepanel. click on a list of <tr> to fire a JavaScript function to add new <option> to the asp dropdownlist. But, when I click on other buttons to callback to the server, I get an error message:
Uncaught Sys.WebForms.PageRequestManagerServerErrorException: Sys.WebForms.PageRequestManagerServerErrorException: Invalid postback or callback argument. Event validation is enabled using
in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. I understand the problem. I need to let server side know the change of the dropdownlist before any other postback. Set validation as false won't work in this case, the dropdown will lose the new item anyway. I did some researches, and the possible solutions:
1)Using ViewState? Request Form? could anyone give an example?
2)Add dropdownlist item in server side. But I want to make the whole tr row clickable to fire the event. Could I click on tr and fire eg. its first child linkbutton or a linkbutton in somewhere else.
3)I've tried Jquery.ajax and webmethod , it can fire server event but since all method are static (shared) , it doesn't allow me to edit the downdownlist instance.
I am using list view to display the the data but i am getting an error like An item placeholder must be specified on ListView 'ListView1'. Specify an item placeholder by setting a control's ID property to "itemPlaceholder". The item placeholder control must also specify runat="server.Even i have specified the itemplaceholder id but no use still same error.
I have a listview set up in "flow" mode where the existing records are all on an extended page so you can scroll down to any record.
The InsertItem Template is in the first position, making it easy to insert a new record.
And one can scroll down the page to any record, click the edit button and update that record -- nice having everything on one scrollable page.
I am running into a problem with validations. I have validation controls restricting inputs for all the textboxes on the Insert Item template. They work fine. And on Item Inserted I am running a page validation:
Page.Validate() If Not Page.IsValid Then e.Cancel = True End If
which works fine also.
The problem occurs when I scroll down to an existing record, and go to edit it. I have all the same validation constraints on the textboxes for the EditItemTemplate as I have on the InsertItemTemplate. But I cannot successfully do a page validation on updating the record. The code I am using on update is:
Protected Sub LVRentals_ItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.ListViewUpdateEventArgs) Handles LVRentals.ItemUpdating Page.Validate() If Not Page.IsValid Then e.Cancel = True End If End Sub
This results in a Cancel even if there are no validation errors on the InsertItemTemplate because the Page.Validate() seems to be causing the InsertItemTemplate to think its fields should be filled out also.
Here is the code for a typical entry of the InsertItem Template:
[code]....
All the controls in the Edit Item template are part of ValidationGroup "edit1" and those of the InsertItem Template are part of ValidationGroup "edit2"
How can I get around receiving validation errors on the InsertItem Template when I am trying to validate just the EditItemTemplate when both are present on the page?
Server Error in '/change image in gridview final' Application.
Compilation Error Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0103: The name 'FileUpload1' does not exist in the current context
Source Error: Line 46: protected void OnRowUpdating(object sender, GridViewUpdateEventArgs e) Line 47: { Line 48: if (FileUpload1.HasFile) Line 49: { Line 50: HttpPostedFile file = ((FileUpload)GridView1.Rows[e.RowIndex].FindControl("FileUpload1")).PostedFile;
im getting this error CS0103: The name 'ProjectName does not exist in the current context, im getting this error on Global.asax. i tried to clean and rebuild but its not working, please tell me how to resolve it?
I am using aspnet menu control and i want to hide the item initially on page load and show the item after an event is trigger say button lick event Can any one give me an example?
I have a data driven asp.net website with frames on the top, left, right and center screen. If a page generates an error on any of the frames, I want to redirect the whole site back to the Default.aspx. Currently, when a frame page errors in one of the frames, that frame gets the error pages. Site is URL.... Is this something that can be handled?
i have a Class named Helper.cs inside my App_Code folder. And i get this error:
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS0103: The name 'Helper' does not exist in the current context
Source Error:
[Code]....
And i know my compiler recognizes the Helper class because the 'Helper' is colored in cyan... means is known by the compiler. What am i doing wrong?
When I add an update command to my page and run the page I get this error message
Server Error in '/MYApplication.
Incorrect syntax near '-'.Must declare the scalar variable "@recnum".
Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '-'.Must declare the scalar variable "@recnum".
Source Error:
[Code]....
Stack Trace: [Code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082
I have built one of those 2 listbox things where the items in the left textbox can be selected and moved to the right list box. The items in the list can be thought of as tasks (like Raise Invoice, Call Client, Deliver goods etc) The rules of this are that the item you move to the right box remains in the left box. Reason being, you are allowed to add the same item from the left to right as many times as you like. An example what the list on the right might look like is this.
Now I have added the feature to select an item on the right and hit the UP button, to move it up in the list. For example I could select 'Deliver Goods' and hit the up button. (the down button works as expected)
My code that loops though and does the move relies on the item.selected property to find which on I have selected. (obviously)
[Code]....
Despite having the items at the bottom of the list selected, the .Selected property is true on the first instance of the item that happens to have the same .Text and .Value.
In my application a mail message send to particular recipeeient with msg body contains a hyper link.. when the recipent click on this link,it will redirect to another form(InternalForm.aspx)... bt when clicking the link error is occured,whuy its happening???? In InternalForm.aspx,page load portion access the link content(badgeno).. page load portion code of InternalForm.aspx is shown below:-
I inherited an application written for VB.Net and am converting it over to ASP.Net, with VB as the back end. I have a data pull that adds values to a new instance of a class, then adds the item to a listbox. It worked great in the VB.Net version, but I get the following error in the Visual Studio Text Editor when I try to use the code:
Overload resolution failed because no accessible 'Add' can be called with these arguments:
'Public Sub Add(Item As System.Web.UI.WebControls.ListItem)':Value of type 'MyItem' cannot be converted to System.Web.UI.WebControls.ListItem'. 'Public Sub Add(Item as String)':Value of type 'MyItem' cannot be converted to String.
I have played around with the code quite a bit and have been researching online, but I'm just drawing a blank here.
I put the class("MyItem") in the "App_Code" folder in a file called "MyItem.vb". The class code is as follows:
[Code]....
The code I have for the sub that is supposed to add the items to the listbox is as follows:
I am having 3 ListBoxs(LB1,LB2,LB3).In LB1 I am binding the names of Courses through database.The code is shon below...
da1 = new SqlDataAdapter("SELECT COURSE_ID,COURSE_NAME FROM Course_Mst", con); DataTable dt1 = new DataTable(); da1.Fill(dt1); lstCourse.DataSource = dt1; lstCourse.DataValueField = "COURSE_ID"; lstCourse.DataTextField = "COURSE_NAME"; lstCourse.DataBind();
Whenever I select particular course in LB1 all the content related to that course will be binded in LB2.The code is shown below.....
protected void LB1_SelectedIndexChanged(object sender, EventArgs e) { da2 = new SqlDataAdapter("SELECT SPEC_ID,SPEC_NAME FROM SPEC_TRANS WHERE COURSE_ID="+Convert.ToInt32(lstCourse.SelectedValue)+"", con); DataTable dt = new DataTable(); da2.Fill(dt); lstSpecilization.DataSource = dt; lstSpecilization.DataValueField = "SPEC_ID"; lstSpecilization.DataTextField = "SPEC_NAME"; lstSpecilization.DataBind(); lstSpecilization.Focus(); }
I am having a ADD button.In LB2 I can select multiple items.When I select multiple items in LB2 and click on ADD all the selected items will be binded into LB3.The code is shown below...
protected void btnAddCourseDetaisl_Click(object sender, EventArgs e) { for (int intLoopIndex = 0; intLoopIndex <lstSpecilization.Items.Count ; intLoopIndex++) { if (lstSpecilization.Items[intLoopIndex].Selected) { ListItem li = new ListItem(lstSpecilization.Items[intLoopIndex].Text, lstSpecilization.Items[intLoopIndex].Value); LB3.Items.Add(li); } } }
My problem is when I select a item from LB2 and click on ADD the selecteditem is added to LB3 but if I select the same item and click on ADD the items are again added to the LB3.I want to prevent this.Pls respond me ASAP.
I have a asp:button in template field of gridview, I set command name for this and in grid I mention on command event. On clicking the page it shows error message is :Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/>
