DataSource Controls :: Data Types Text And Varchar Are Incompatible In The Equal To Operator?

Jul 4, 2010

I get the following error: The data types text and varchar are incompatible in the equal to's my code (PageName is a string Parameter) :

SqlConnection sql = SQLconnection();
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "Select title, text, postdate, sticky from articles where pagename = @pagename;";

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Similar Messages:

Data Types Text And Varchar Are Incompatible In The Equal To Operator?

Dec 4, 2010

Here is the code:


Dim intusercount As Integer = 0
Using connection As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Database.mdf;Integrated Security=True;User Instance=True")
Using command As New SqlCommand("SELECT [ID] FROM [Members] WHERE [Username]=@Username AND [Password]=@Password", connection)
command.Parameters.Add("@Username", Data.SqlDbType.VarChar).Value = TextBox1.Text
command.Parameters.Add("@Password", Data.SqlDbType.VarChar).Value = TextBox2.Text
intusercount = command.ExecuteScalar
If intusercount > 0 Then
End If
End Using
End Using

The data types text and varchar are incompatible in the equal to operator.

Source Error:

Line 11: command.Parameters.Add("@Password", Data.SqlDbType.VarChar).Value = TextBox2.Text
Line 12: connection.Open()
Line 13: intusercount = command.ExecuteScalar
Line 14: connection.Close()
Line 15: If intusercount > 0 Then


[SqlException (0x80131904): The data types text and varchar are incompatible in the equal to operator.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +2030802
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5009584
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2275
System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33
System.Data.SqlClient.SqlDataReader.get_MetaData() +86
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +311
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +987
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +162
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32
System.Data.SqlClient.SqlCommand.ExecuteScalar() +139
_Default.Button1_Click(Object sender, EventArgs e) in C:UsersUserDocumentsVisual Studio 2010WebSitesWebSite13Default.aspx.vb:13
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

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ADO.NET :: Getting Error - The Data Types Text And Varchar Are Incompatible In The Equal To Operator?

Nov 10, 2010

So admitingly I am fairly new at .NET...I have been a PHP guy for rather long time...

Heres my code:


Essentially what I am trying to do is query the SQL database by the username. This above code is a method within the user respository for fetching a user by their username. The variable "username" is passed in as a string.

When the method is called a recieve the following error:

The data types text and varchar are incompatible in the equal to operator.

This to me is rather confusing since the field in the database, user_username, is a text and the variable passed in, as said, is a string. They should be synonomous for all practical purposes.

Ideas? Thoughts? Fixes?

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ADO.NET :: The Data Types Ntext And Nvarchar Are Incompatible In The Equal To Operator - How To Avoid This Error

Mar 16, 2011

I've found a lot of similar topics but none of them solves my problem.

I have table structure like that


Everyone suggests to change ntext type to nvarchar(MAX) and life will be beautyfull. But... First, I need
ntext, simply because there should be text in this field.

nvarchar(MAX) equals 4096 bytes which is to small for large text. Second, I already have table with
ntext field, which does not cause this error.

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DataSource Controls :: SQL Server Does Not Handle Comparison Of NText, Text / Xml Or Image Data Types

May 24, 2010

I have a bit of code in a clickevent handler like this:-

Dim products = From p In db.Products where p.product_name = "Tool" Select New With {p.Product_ID,p.Product_name}
Gridview1.Datasource = products

But causes error=SQL Server does not handle comparison of NText, Text, Xml, or Image data types?

where product_name field is set as type text

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C# - All Queries Combined Using A UNION, INTERSECT Operator Must Have An Equal Number?

Jan 7, 2010

I have a linq to sql query where I have to perform union two set of records.

And I do not have equal number of fields, so added the null

eg my psuedo code is


after googling some hours I came to understand that it is bug in 3.5 framework.

Now I want to retrieve the result.

How do I do thatI tried framing into two seperate iqueryable

var a= first query

var b =second query

ilist result =a.union b

This too results in the same error.

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.net - Two Incompatible Session State Types In ASP.NET?

Mar 27, 2011

I see two means of working with session data in ASP.NET MVC:

System.Web.SessionState.HttpSessionState, available on HttpApplication
System.Web.HttpSessionStateBase, available on Controller

Data stored in one seems to be available in the other. Unfortunately the only common ancestor of these two types is System.Object, meaning that I can't create reusable utility code for the abstraction of either.Why is the API this way? Is there an important difference between the two that I am missing?

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DataSource Controls :: Editing Text Enconding Problem With Varchar() Type?

Apr 13, 2010

when I edit varchar field and save it to Sql Server, edited non-english text look as ??? symbols.I tried to correct this as

in web.config:


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DataSource Controls :: System.Data.SqlClient.SqlException - Error Converting Data Type Varchar To Bigint?

Jan 16, 2010

I have a website having an aunthentication system. When I am setting my website on IIS 6 the code is absolutly working fine. But when i configure the website on IIS 7 (Windows 2008 server) it is showing me the above error. I am using a stored procedure for it

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DataSource Controls :: GridView Sum / Want To Sum All Items That Are Equal?

Jun 4, 2010

Im creating a Report to see all I have sold to a Client, my SQL query looks like this


What I dont want is to get a list of repeted items, I want to sum all items that are equal. for exemple:

Current Situation:

What I want to acomplish

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DataSource Controls :: Looking For A Solution Using IN-Operator With LINQ TO SQL?

Jun 21, 2010

i am looking for a solution using IN-Operator with LINQ TO SQL. I have found many examples after searching but no exemple which is using a Textbox.In my Textbox i put my ids 2,4,6,7,9 and after clicking the button, it have to show me my Records. But it does not.The error-message shwos me a wrong format.Ausnahmedetails: System.FormatException: Die Eingabezeichenfolge hat das falsche Format.

Zeile 5: Dim result As String = ""
Zeile 6: Dim intText As String = Me.tbKursid.Text
>>>>>>>> Zeile 7: Dim myText() As Integer = {Convert.ToInt32(intText)}
Zeile 8: Dim db As New seminarDataContext
Zeile 9: Dim daten = From c In db.vSchluessel _

If i use Dim myText() As Integer = {1,4,5,6} then it runs without problems. What is wrong?


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DataSource Controls :: Data Types For Derived Or Calculated Columns?

Apr 26, 2010

I spent an hour googling and trying. No success. I want to get the digits behind the dot or comma for my calulcated column:


But it just shows me a 0 and no other digits.

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DataSource Controls :: Datatable Data Types And Command Parameter Datatype?

Apr 7, 2010

I am using VS 2008.I am building a datatable of records to be inserted into a SQL Server 2005 table.
The program loops through this table and builds a SqlParameter for each DataColumn in the datatable. The SqlParameters are used in the SQL Insert statement.

The field I am having a problem with is of type 'bit' in the database table and has no default value and cannot be nulls. The field is called 'Active' The meaning of this field in the application is Boolean i.e True or False. When inserting the record, I wish to default the field to "False".

When I define the columns in the datatable I am forced to use the following code to build the datatcolumn containing the boolean field i.e. dtcActive.DataType = GetType(Boolean) as there is no GetType(Bit)

Dim dtcActive As New DataColumn("Active")
dtcActive.DataType = GetType(Boolean)
dtcActive.Unique = False
dtcActive.AllowDBNull = False
dtcActive.DefaultValue = False

However, when I build the SqlParameter I am forced to use this:

If field.ColumnName = "Active" Then
prm.SqlDbType = SqlDbType.Bit
prm.Value = "False"
End If

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I want to retrieve all the records where the datetime is greater than or equal to 30 days ago. What is the correct formatting for this line: WHERE Property.dateadded >= NOW -30 days .. Dateadded field is in datetime format.

SELECT TOP (1) Property.Name, Property.Price, Department.DepartmentTitle, Images.ImageId, Property.DateAdded
Department ON Property.DepartmentId = Department.DepartmentId LEFT OUTER JOIN
Images ON Property.PropertyId = Images.PropertyId
WHERE Property.dateadded >= NOW -30 days

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DataSource Controls :: Map Stringbuilder With Varchar?

Feb 12, 2010

Im developing a web application in where i have gridview with some text box controls in it.In runtime we are creating a new row dynamically by clicking add button .To insert data into the database.i used a stringbuilder instead of string becoz the data what i have to insert into database is more.but i am gettin the following error No mapping exists from object type System.Text.StringBuilder to a known managed provider native type. in database the datafield column datatype is varchar(max).

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DataSource Controls :: How To Use Varchar And NVarchar

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I want to use three language: English, German and italian. If i will use varchar type, will i face any problem or I have to use nVarchar.

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DataSource Controls :: Using Cast And Sum On VarChar Column?

Sep 29, 2010

I have a little problem developing a SQL Select Statement on a column that is formatted pretty badly. Firstly, the Database has already been created and filled with Data in a Test Environment, I'm not sure if the format is the same or has been updated in Production but since I'm only able to work with the Test Environment right now I'm stuck with using what I have. The Column in one Table shows a Snapshot of a clients account which is set to VarChar(50) but the actual data in the column is formatted like a money format (with a $ and decimal point so for example "$5,000.00" would be an entry in one Row).

What I'm trying to do is a create a WebService that will be used in a iPhone Application and one of the Methods needs to just give a quick display of the total value of all Clients with each specific company but I can't perform a SUM function on a VarChar column and I've tried to CAST and CONVERT the column into money, int, decimal and just about every format I can think of but I keep getting an error stating that I convert the data type varchar to which ever one I'm trying. I think it has something to do with the $ already listed in the Column, so I wanted to know what I could do to either remove the $ sign (like a Trim option) or if there is a better way of doing this that I can't think of. I know the best option would be to convert the column to the appropriate format but as I said, this was a previously designed system and I'm not sure if the Production area is the same (most likely not).

Here's what I've tried so far:


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DataSource Controls :: Difference Between Char And Varchar?

Apr 4, 2010

What are the basic difference between the char and varchar datatype ?

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DataSource Controls :: Replace All Varchar To Nvarchar?

Apr 1, 2010

i want to convert all my database columns whose data type is char,varchar, nchar to nvarchar datatype. But the main problem is that some of my primary key, foreign key columns are also of varchar datatype. So when i try to change their datatypes to nvarchar then i receive the errors related to constraints of Primary Key, Unique Key and indexes. how to change the datatypes to nvarchar after droping the constraints and after changing all constraints will apply again. I also want that no data loss will occur.

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I have a insert into statement thats inserting my numbers from a numeric text box on my aspx page. I am choosing the Amount Type then putting in a a number.

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I then put in say Misc Credit and enter 200.00 it inserts in that into the database woot.

The look up table that has my amount types has a field called numeric opperator which is either + or - the Credit being a - and the Charge being a + then my stored procedure takes all my + numbers and adds them up and subtracts all the - numbers.

I want to change that so that it actuall be inserted into the table as a - number form the start. So I want choose Misc Credit enter 200.00 and click add then my event says o yea thats a credit insert 200.00 as -200.00

How can I do that?


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DataSource Controls :: Padding In Varchar Database Field?

May 7, 2010

I am using:

href='<%# Eval("Directory")+eval("Agenda")%>

to provide a link to documents held in directory so directory contains [URL] or [URL] Agenda contains


If I declare Directory as VarChar(nnn) where nnn is large enough to accomodate the longer field, The statement <%# Eval("Directory")+eval("Agenda")%> returns

[URL]self.aspx/.Public/ 00209-FebruaryMtgMin%5E_.pdf

How can I get rid of the Pad characters?

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In my database im storeing date as varchar. Now i want to display the table in grid view sorted by date.So how to convert varchar to datetime.

Im trying the following querry but its not working.


[place], [country],
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I'm using Visual Studio 2008 Query Builder and am trying to pass a value to a parameter that uses the IN OPERATOR.Here is my sql from qb:

FROM vwHRIC_EC_ContractSummary

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DataSource Controls :: Specify Size For A Nvarchar(max) Or Varchar(max) Type Of Parameter In ADO.Net?

Mar 4, 2010

I have an output parameter called '@packIds', that I create in ADO.Net using the code below:

SqlParameter packIdPara = new SqlParameter("@packIds", null);
packIdPara.SqlDbType = SqlDbType.VarChar;
packIdPara.Direction = ParameterDirection.Output;

How will I specify that the parameter '@packIds' is of max size? I cannot find any code for this.


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DataSource Controls :: Filtering Date Stored As Varchar In Table

Mar 9, 2010

I save dates as a string in a varchar data field named "TilDato" in a SQLServer-express table. I want to filter the records smaller than a specific date from a variable in the script. I try the following statement, but it does not seems function logically.

objCmd = new
SqlCommand("SELECT * FROM Reservering WHERE @laanedato<=TilDato",myConn2);
objCmd.Parameters.Add("@laanedato", laanedato);
objRdr = objCmd.ExecuteReader();

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