Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.TextBox'
Hello, Goal: enter a number in two fields HoursPerUnit and PeoplePerUnit and the value for the third field, TotalHoursPerUnit will populate after the the number in the two fields have been caculated.  Using the code below I receive the error message above.  Please tell me what am I doing wrong? Do I need to cast the text as a literal?  Please help? Thank you in advance, <%@ Page Language="VB" MasterPageFile="Default.master" AutoEventWireup="false" CodeFile="frmHR.aspx.vb" Inherits="frmHR"...

Unable to cast object of type 'System.Web.UI.WebControls.Label' to type 'System.Web.UI.WebControls.TextBox'
I am attempting to "Update" a field in a Datagrid, but no matter what I do (Using either Label or Text Boxes)  I keep getting the same error: Unable to cast object of type 'System.Web.UI.WebControls.Label' to type 'System.Web.UI.WebControls.TextBox' The Error is highlighted below in the Sub... <==THE FIELD THAT CALLS THE ERROR  Any help would be greatly appreciated !!! Thanks !!   The code is as follows... <table border=0 height=210 bordercolor=olive ><tr valign=top><td> <asp:datagrid id="FacilityDataGrid"...

Unable to cast object of type 'System.Web.UI.WebControls.FormView' to type 'System.Web.UI.WebControls.DropDownList'.
Hi,  I have a formview with a dropdownlist created dynamically. i want to determine whether the dropdownlist was clicked. the code is written in the FormView1_DataBound method. I get the following error in the line below that is in italics and underlined: Unable to cast object of type 'System.Web.UI.WebControls.FormView' to type 'System.Web.UI.WebControls.DropDownList'.   Here is my code: ddl_iFullname = New DropDownList ddl_iFullname.ID = "ddl_iFullname" ddl_iFullname.DataSource = ObjectDataSource3 ddl_iFullname.DataTextField = "fullname" ddl_iFullname.DataValueField = "...

Error showing up: Unable to cast object of type 'System.Web.UI.WebControls.TextBox' to type 'System.IConvertible'.
Hi, I am trying to pass date values from two textboxes in a stored procedure from ASP.net page. However, it seems it is not passing the date properly. I am getting the following error at the following line: cmd_r.Parameters("@initial_est_date").Value = Convert.ToDateTime(Textbox1)  and the error is as stated in the title. I would appreciate any help to resolve this. Thanks  CODE:<%@ Import Namespace="System.Data" %> <%@ Import Namespace="System.Data.SqlClient" %><%@ Import Namespace="System.Data.Common" %> <%@ I...

Unable to cast object of type 'System.Int32' to type 'System.Web.UI.WebControls.DataKey'
hi , i have a datalist with an itemtemplate section that contains an image and a delete button to delete the corresponding image . <asp:DataList ID="DataList1" CellSpacing="25" runat="server" DataSourceID="sqldatasource3" DataKeyField="ID" repeatColumns="4" repeatdirection="Horizontal" BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="0px" CellPadding="3" > <ItemTemplate> <table border="0" cellpadding="0" cellspacing="0" > <tr> <a href='<%# DataBinder.Eval(Container.DataItem, "image", "ImageViewer.aspx?id={0}") %>' > <img a...

Unable to cast object of type 'System.EventArgs' to type 'System.Web.UI.WebControls.GridViewRowEventArgs'
hi this is really really bugging me please help. I have a web appliction that uses a Master Page. On one of the content pages I am presenting a gridview control bound to a spreadsheet. The gridview is contained within an ajax update panel. I want to add attributes to the rows of the gridview control once databound (mouseover effect). However I am getting the following error:- Unable to cast object of type 'System.EventArgs' to type 'System.Web.UI.WebControls.GridViewRowEventArgs' Can anyone help please. Here is the aspx code:-  <%@ Page Language="v...

Unable to cast object of type 'System.String' to type 'System.Web.UI.WebControls.Parameter'.
I'm getting this error on a vb.net page the needs to execute two separate stored procedures.  The first one, is the main insert, and returns the identity value for the ClientID.  The second stored procedure inserts data, but needs to insert the ClientID returned in the first stored procedure.  What am I doing wrong with including the identity value "ClientID" in the second stored procedure?  Unable to cast object of type 'System.String' to type 'System.Web.UI.WebControls.Parameter'. Description: An unhandled exception occurred during t...

Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'x_it.Controls.NewsDetail'.
I have dynamicly filled a Panel with my usercontrols, I have no problem. But when I try to get in a for loop to read the data of my usercontrol, I get an error. Can somebody explain me what I'am doing wrong ?   for (int i = 0; i < PnlNewsDetails.Controls.Count; i++) { x_it.Controls.NewsDetail nd = (x_it.Controls.NewsDetail)(PnlNewsDetails.Controls[i]); if (Request.RequestType == "POST" && !nd.ErrorInput) { tbNews tn = new tbNews(); tn.Date = nd.Date; tn.Title = nd.Title; tn.SeoUrl = nd.SeoUrl; ...

Error: Cannot convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.ButtonField'
Hello, I am getting the following error during compiliation. Any suggestions to fix it. Thanks. Cannot convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.ButtonField' protected void gvEvents_RowCommand(Object sender, GridViewCommandEventArgs e) { if (e.CommandName == "Select") { int index = Convert.ToInt32(e.CommandArgument); GridViewRow selectedRow = gvEvents.Rows[index]; string sID; ButtonField btn; if (selectedRow.RowType == DataControlRowType.DataRow) { sID = ((ButtonField)selectedRow.FindControl("ID")).DataTextFi...

Unable to cast object of type 'System.Web.UI.WebControls.ContentPlaceHolder' to type 'CustomerDB._Default'.
If have  a problem regarding the error message: Unable to cast object of type 'System.Web.UI.WebControls.ContentPlaceHolder' to type 'CustomerDB._Default'. I am using MaterPages with two ContentPlaceHolders in my default.aspx In the fist ContentPlaceHolder I have added a ordinary placeholder where I loads a Usercontrol. So far so good.The usercontrols search for customers and creates a gridview with a link that  the user can click on. When the user clicks it runs a class (located in default.aspx) that should present data in the second ContentPlaceholder, ...

ASPNET2 HELP! CS0266: Cannot implicitly convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.FileUpload'.
Server Error in '/start-movieposters' 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: CS0266: Cannot implicitly convert type 'System.Web.UI.Control' to 'System.Web.UI.WebControls.FileUpload'. An explicit conversion exists (are you missing a cast?) Source Error: ...

Error Serializing Value 'System.Web.UI.WebCOntrols.TreeNode' of type 'System.Web.UI.WebCOntrols.TreeNode'
Hi, I am  getting the error stated in the subject when i am storing a TreeNode in a ViewState and then using it as follows if (ViewState["ProductCounty"]!=null) { TreeNode _productCountyNode = DataTree.FindNode(((TreeNode)ViewState["ProductCounty"]).ValuePath); _productCountyNode.Expand(); } what could be causing this error? Hi, I believe TreeNode isn't serializable in a way its required for objects which can be put to ViewState - as reference - (TreeNode implements IStateManager and is meant to work together with TreeView itself saving it...

Unable to cast object of type 'System.Web.Compilation.BuildResultCompiledAssembly' to type 'System.Web.Compilation.BuildResultCompiledGlobalAsaxType'
I always get the below exception if I make a configuration change to the web.config file then request a page without re-building the project. Exception: Unable to cast object of type 'System.Web.Compilation.BuildResultCompiledAssembly' to type 'System.Web.Compilation.BuildResultCompiledGlobalAsaxType'. Stack Trace: [InvalidCastException]: Unable to cast object of type 'System.Web.Compilation.BuildResultCompiledAssembly' to type 'System.Web.Compilation.BuildResultCompiledGlobalAsaxType'.   at System.Web.Compilation.ApplicationBuildProvider.GetGlobalAsaxBuildResult(Boolean isPrec...

Unable to cast object of type 'System.Web.Configuration.ScriptingScriptResourceHandlerSection' to type 'System.Web.Configuration.ScriptingScriptResourceHandlerSection'.
Hello, I get this lovely error whenever I attempt to load an AJAXToolKit ScriptManager. It is the only one I have on the page. If I use the regulare script manager, my extenders don't detect it. I'm placing the ScriptManager just after the <Form> tag. The frustrating part is that it works when I preview it in the browser from my development machine it works, but once I place it the live server, it crashes on me . I've installed all of the .dlls in the proper places. Also, I'm trying to attempt to do this when creating a new site with the AJAX ToolKit enabled templat...