SQLDataAdapter Error

Jul 6, 2007

Hi,



I am porting an ASP.NET/C# application from Microsoft Access to SQL Server 2005. In my code I have a method that uses the DataAdapter class to open a table, read some values out of it which are stored, open a second table, read some additional data from it storing the data in the same structure as used before, then updating the first table with the combined data.



When I execute the dataAdapter.Update() method I get the following error:



"Dynamic SQL generation for the Update Command is not supported against a Select Command that does not return any key column information."



I am uncertain what this error is about. This code worked fine against Microsoft Access so it must be something different in how SQL Server works.



Can anyone tell me what this error is complaining about?



Many thanks!



Bob

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Arithmetic Overflow Error Converting Expression To Data Type Int When Using Fill From A SqlDataAdapter

Mar 7, 2007

I thought I'd post this quick problem and answer, as I couldn't find the answer when searching for it. 
I tried to call a stored procedure on SQL Server 2000 using the System.Data.SqlClient objects, and was not expecting any unusual issues.  However when I came to call the Fill method I received the error "Arithmetic overflow error converting expression to data type int."
My first checks were the obvious ones of verifying that I'd provided all the correct datatypes and had no unexpected null values, but I found nothing out of order.  The problem turns out to be a difference on the maximum values for integers between C# and SQL Server 2000.  Previously having hit issues with SQL Server integers requiring Long Integer types in VB6, I was aware that these are 32-bit integers, so I was passing in Int32 variables.  The problem was that Int32.MaxValue is not a valid integer for SQL Server.  Seeing as I was providing an abitrary upper value for records-per-page (to fetch all in one page), I was simply able to change this to Int16.MaxValue and will hit no further problems as this is also well beyond any expected range for this parameter.
 If anyone can name off the top of their heads what value should be provided as a maximum integer for SQL Server 2000, this might be a useful addition, but otherwise I hope this spares others some hunting if they also experience this problem.
James Burton

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Dec 21, 2006

Help! I have posted this before and I had hoped that the VS2005 SP1 would help my problem. It didn't. My code is shown below. I have dropped a sqlconnection, sqldataadapter and a strongly-typed dataset from the toolbox onto the component designer for my page and written my code. It compiles without any errors but at runtine I receive the system error "Object reference not set to an instance of an object." The error occurs at the first line where the sqldataadapter is mentioned. I have shufflled the code and the error still occurs at first mention of the dataadapter. I have set parameters to a simple string such as "myemail." It hasn't helped. I have used the "Dim" statement as "Dim DaAuthorLogin as System.Data.SqlClient.SqlDataadapter and Dim DaAuthorLogin as New ......) at the start of the private sub generated by the event requiring the data. Nothing helps. Here is my simple code to select data from a sqlserver 2000 database. Why do I continue to get this error?
Partial Class AuthorLogin
Inherits System.Web.UI.Page
Protected WithEvents AuthorInformation As System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand
Me.DaAuthorLogin = New System.Data.SqlClient.SqlDataAdapter
Me.MDData = New System.Data.SqlClient.SqlConnection
Me.DsAuthorLogin = New MedicalDecisions.DsAuthorLogin
CType(Me.DsAuthorLogin, System.ComponentModel.ISupportInitialize).BeginInit()
'
'SqlSelectCommand1
'
Me.SqlSelectCommand1.CommandText = "SELECT AuthorAlias, AuthorEmail, AuthorPassword, LastName, PreferredName" & Global.Microsoft.VisualBasic.ChrW(13) & Global.Microsoft.VisualBasic.ChrW(10) & "FRO" & _
"M T_Author" & Global.Microsoft.VisualBasic.ChrW(13) & Global.Microsoft.VisualBasic.ChrW(10) & "WHERE (AuthorEmail = @AuthorEmail) AND (AuthorPassword =" & _
" @AuthorPassword)"
Me.SqlSelectCommand1.Connection = Me.MDData
Me.SqlSelectCommand1.Parameters.AddRange(New System.Data.SqlClient.SqlParameter() {New System.Data.SqlClient.SqlParameter("@AuthorEmail", System.Data.SqlDbType.NVarChar, 50, "AuthorEmail"), New System.Data.SqlClient.SqlParameter("@AuthorPassword", System.Data.SqlDbType.NVarChar, 50, "AuthorPassword")})
'
'DaAuthorLogin
'
Me.DaAuthorLogin.SelectCommand = Me.SqlSelectCommand1
Me.DaAuthorLogin.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "T_Author", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("AuthorAlias", "AuthorAlias"), New System.Data.Common.DataColumnMapping("AuthorEmail", "AuthorEmail"), New System.Data.Common.DataColumnMapping("AuthorPassword", "AuthorPassword"), New System.Data.Common.DataColumnMapping("LastName", "LastName"), New System.Data.Common.DataColumnMapping("PreferredName", "PreferredName")})})
'
'MDData
'
Me.MDData.ConnectionString = "Data Source=CIS1022DAVID;Initial Catalog=CGData;Integrated Security=True;Pooling" & _
"=False"
Me.MDData.FireInfoMessageEventOnUserErrors = False
'
'DsAuthorLogin
'
Me.DsAuthorLogin.DataSetName = "DsAuthorLogin"
Me.DsAuthorLogin.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema
CType(Me.DsAuthorLogin, System.ComponentModel.ISupportInitialize).EndInit()
End Sub
Friend WithEvents SqlSelectCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents MDData As System.Data.SqlClient.SqlConnection
Friend WithEvents DaAuthorLogin As System.Data.SqlClient.SqlDataAdapter
Friend WithEvents DsAuthorLogin As MedicalDecisions.DsAuthorLogin
'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs)
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
'no code here
End Sub
Private Sub AuthorLoginRegister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginRegister.Click
'for new author registration
Response.Redirect("AuthorInformation.aspx")
End Sub
Private Sub AuthorLoginBack_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginBack.Click
'to navigate back
Response.Redirect("MainPaths.aspx")
End Sub
Protected Sub AuthorLoginPassword_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginPassword.TextChanged
'pass the parameters to the dataadapter and return dataset
DaAuthorLogin.SelectCommand.Parameters("@AuthorEmail").Value = AuthorLoginEmail.Text
DaAuthorLogin.SelectCommand.Parameters("@AuthorPassword").Value = AuthorLoginPassword.Text
MDData.Open()
DaAuthorLogin.Fill(DsAuthorLogin, "T_Author")
MDData.Close()
'set session objects
If DsAuthorLogin.T_Author.Rows.Count > 0 Then
Session("AuthorAlias") = DsAuthorLogin.T_Author(0).AuthorAlias
Session("LastName") = DsAuthorLogin.T_Author(0).LastName
Session("PreferredName") = DsAuthorLogin.T_Author(0).PreferredName
Response.Redirect("AuthorPaths.aspx")
Else : AuthorLoginNotValid.Visible = True
AuthorLoginEmail.Text = ""
AuthorLoginPassword.Text = ""
End If
End Sub
End Class
 
Thanks in advance,
David

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Sep 30, 2007

hi
it looks like my thread has been deleted but I keep on asking.
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"Check" Generated SELECT Statement
"Check" Generated Mappings
"Warning" Generated INSERT Statement
There were errors configuring the data adapter
"Warning" Generated UPDATE Statement
There were errors configuring the data adapter
"Warning" Generated DELETE Statement
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Oct 1, 2007

Hi all,
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Jun 3, 2008

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Feb 6, 2004

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Mar 16, 2007

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Jul 13, 2007

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      .....................
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cheers Mike
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Feb 7, 2008

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Mar 31, 2004

I have a block of code that does a Fill() with a DataAdapter, which seems to throw an exception if no values are returned. Then, when I try to bind the DataSet that gets filled, an error occurs, it doesn't even try to bind the column headers or anything.

This process seems to work fine when some rows are found, but it is not always guaranteed that the row count will always be > 0. The nice thing about using the Fill() function, is that it creates all my column headers automatically, so I was just wondering if there's a way to do a Fill() then a subsequent DataBind() to a DataGrid which would automatically format the columns even when no rows are found?

Here's a bit of the source.. if the last line finds no rows, it throws an exception ( I assume this is normal):

strSQL = "SELECT * FROM Prods";
cm.CommandText = strSQL;
da = new SqlDataAdapter( cm );
da.Fill(shelf);

Anyone got any ideas on how to fix this problem?


Brent

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SELECT m.title, m.movieID, a.personID, 'Actor', p.firstName + ' ' + p.lastName
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2 {
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4
5 SqlParameter p1 = new SqlParameter("@companyId", SqlDbType.UniqueIdentifier);
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8
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11
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13
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25 }
26 finally { }
27 }
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Response.Write("<h2>" & SQLError.Message & "</h2><br />")
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lineNum = lineNum + 1
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<Func Name='Do_sqlPerfmon2'>
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<Func Name='Do_sqlPerfmon2'>
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PerfTime Stop: Do_sqlPerfmon2 : Tue Jun 12 10:20:02 2007
Gathering darwin properties for failure handling.
Error Code: 2
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