Web Forms :: Implicit Type Casting From "obj" To String Failing In 2.0?
Jun 25, 2010
I am using the following code to convert any valid object, to a date time:
[Code]....
When i call this mehod from my web pages, using a blank("") value in TextBox.Text property as a parameter, the method is throwing an FormatException exception.
[Code]....
Ironically, the same method does not throw any exception with the same input when tried in a different machine.
Are there any regional setting that need to be modified in .NET 2.0 for this to work ?
P.S:
The method also works when called using a string variable, like
I'm having trouble with the implicit type validation for model properties. The validation/error messages (for numeric fields explicitly) are printed in English (I want them to be printed in Swedish). Does anyone know how to override those messages? Or can I turn of implicit type validation? The error message I'd like to translate/localize is "The field {0} must be a number."
The GenerateRowColumnDataTable method retrieves all form variables with <input> tags. My problem is that my columns are named in a strange format like this:
#X#_G1_NAME_1 so when I look at what's being rendered I see %23X%23_G1_NAME_1 so I thought I could use Server.URLEncode() around Request.Form but I'm getting an errot that it can't be converted to a string. What would you do in this case?
Implicit conversion from data type sql_variant to varbinary is not allowed. Use the CONVERT function to run this query.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Implicit conversion from data type sql_variant to varbinary is not allowed. Use the CONVERT function to run this query.
Page1 contains GridView1 which displays info from Table1.GridView1 contains a CommandButton which, when clicked inserts the values of all columns, plus a calculated value which goes into an extra column into Table2 handled in the RowCommand event handler of GridView1.Page2 contains GridView2 which displays info from Table2.GridView2 allows the user to alter the value of one of the columns in Table2 using the standard Edit/Update link.All this worked well until...I added UserId and SessionId fields to Table2 (uniqueidentifier and varchar(MAX) respectively,I added the following code to Page1 Code Behind to insert these values from the RowCommand handler:
[Code]....
All of this works beautifully. But... I then added this code to GridView2's RowUpdating event handler:
i have a xml file and i am retrieving its value using Linq to xml and assigning it to ViewData.
[code]...
but foreach (var item in ViewData["Persons"] is giving type casting error..what should be the exact type csting so that i can retrive values in the format item.Fname.
I am a newbie in ASP.NET. I am facing this problem. I need to insert data into my database, where is primary key uniqueidentifier. I am using FormView and if I insert data there is an error. In asp:Parameter there is no datatype, which is support uniqueidentifier.
I want to enable/disable controls of a asp.net page against a logged in user's permission. say 'admin' & 'hr' can change user's birth date text-box in a page but others will see the text-box as disabled.
The above code generated Option Strict On disallows implicit conversions from 'String' to 'Integer' error under the Item("Address") I don't know what i did wrong...
I�m trying to use session to store a value (id). The problem is that I have to store it as a string. When trying to use the instance of the id I get the error:
Exception Details: System.InvalidCastException: Specified cast is not valid.
Source Error:
Line 156: Line 157: Nemanet_Navigation newFile = new Nemanet_Navigation(); Line 158: newFile.Nav_pID = (Guid)Session["id"]; Line 159: Line 160:
This is where I get the id and that seems to work fine. Session["id"] gets the value.
Having a bit of trouble with a logon page I created using text boxes for a User ID number and a password.
Basically, my original design was to have a textbox for a username and one for a password. Due to some complications, I changed the username to the User ID number input and as such, the input credentials went from being a string to an integer. I've changed this successfully, however when I now type in a string, rather than the integer it requires, the page fails.
how to edit this so if a user enters a string value instead of a numeric value, an error message can show up on a label instead of the whole project coming to a halt because of an error?
Here's the code I have for the page so far, which does the job (apart from this problem!)
using System; using System.Data; using System.Data.Sql; using System.Data.SqlClient; using System.Data.SqlTypes;
I have a scenario where i have to pass the array list to the WebService.
WebService:
[WebMethod] public void GetCommission(List<BOLibrary.Flight.DTContract> Loc) { CommissionManager test = new CommissionManager(); }
Client:
List<BOLibrary.Flight.DTContract> BoList = new List<BOLibrary.Flight.DTContract>(); BOLibrary.Flight.DTContract dtConboj = new BOLibrary.Flight.DTContract(); dtConboj.ValidatingCarrier = "AA"; DTContract[] loc1 = BoList .ToArray(); service.GetCommission(loc1);
when i am trying to do this i am getting the exception that cannot convert the BOLibrary.Flight.DTContract to DTContract This is because when webservice create proxey consider Type(DTContract) not namespace(BOLibrary.Flight.DTContract)and i have to pass the list or arraylist of BOLibrary.Flight.DTContract Type.
I have a FormView that allows a user to register for a company event. I want to do a couple of things with this form.
1. I need to write this data to a MS SQL database
2. I need to send an email confirmation of their registration to their email.
I know how to do both of these things, but i am having trouble doing both at the same time.
It would be nice if I could do it in one click, but I coded it into two pages to try to help simplify it.
The first page allows the user to input their information into a formview and when they click the submit button, it places those answers into session variables:
[Code]....
[Code]....
The Second page confirms the users information by taking those session variables and placing them into labels:
[Code]....
[Code]....
However, after I place information into the formview on the first page, it throws up this error:
"Conversion from type 'TextBox' to type 'String' is not valid".
I have a gridview which I'm trying to get the display of phonenumbers listed in a certain display format; (xxx) xxx-xxxx.If I have the code such as this, it displays the unformatted phone number and (000) 000-0000 for the null items.
I have a web in ASP.NET AND CODE IN VB MY DATABASE IS ACCESS WHICH WAS CREATED INITIALLY AND OLD DATA IS ACCESSED FROM THIS ACCESS DATABASE.
THE PROBLEM IS WHEN THE FIELD IS BLANK THE FOLLOWING ERROR COMES
Conversion from type 'DBNull' to type 'String' is not valid.
MY CODE IS AS UNDER
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click Dim PNO As String = inputtxt.Text Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=C:awingAWing.mdb" Dim con As OleDbConnection = New OleDbConnection(connectString) con.Open() Dim qstr As String qstr = "select * from PersData where PNO='" + inputtxt.Text + "'"
I'm trying to pass email addresses from an array to a stored procedure, then display the results in my gridview. I get the following error:No mapping exists from object type System.String[] to a known managed provider native type.On this line: Dim DR As SqlDataReader = MyCommand.ExecuteReader
Basically, what I did is that: I have a table in SQL database and some of data fields allow null. I built Objectdatasource through dataset. When I built update page using dataset. It generate the following error before showing the update page correctly. It seems I have issue to retrieve the null value from the database through using objectdatasource through dataset. Any suggestions?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
I have this error "The given value of type String from the data source cannot be converted to type datetime of the specified target column." when I used sqlbulkcopy to do the transaction
Above is my code. The error I'm get is, Unable to cast object of type 'System.DateTime' to type 'System.String'.
The column "To" and column "Subject" are strings and column "Receive" is DateTime. I can't made any changes in the database, so I need to write some code to handle casting a string to datetime or if statement as a work around.
I seem to be having issues with posting forms with DropDownLists. I've looked all over the net and tried various solutions, but none seem to work for me.
I'm getting the following error: The parameter conversion from type 'System.String' to type 'Models.Organization' failed because no type converter can convert between these types.
Here's my ViewModel:
[Code]....
Here's my controller:
[Code]....
The objects are generated by ADO.NET Entity Framework. Organizations is its own object, but also a property of Profile (each user belongs to one organization). Now I understand what the error message is saying, just not sure how else I'm supposed to do this.
