Programmatically Changing A DataReader's SQL Statement
Oct 26, 2005Hi,
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Passing A Table Programmatically To Datareader Source Component In Ssis
Feb 26, 2007Hi There,
I am loading/executing packages from c# and I need to populate a temp table from user input and pass this table as a variable to the datareader source components sql command. I am using expression to build this query, but I am getting design time error when I have this command..
"select id, (SysDate + 28) as ExpiresDate from Table1 where id in (Select Id from" +@[User::Table2]+")"..
I have declared Table2 as a variable of type Object and I am creating Table2 in C# and I am assigning that Table to the user Table. But in the design mode, I am getting an error...expression cannot be evaluated.
Can anybody please tell me when I cannot do this?
Thanks,
Changing SQL String Of A DataReader At Runtime
Apr 22, 2008
Hello
I am connecting to an Intersystems Cache' database and extracting data with a DataReader.
Does anyone have a suggestion or example on how to change the SQL String at runtime?
Everything I could find only dealt with setting the SQL String at design time.
Error When Changing The Length On DataReader Source
Nov 3, 2006Hi,
I am trying to import data from Oracle RDB into SQL Server 2005 using SSIS. Created a ODBC data source to connect to Oracle and used DataReader Source component and ADO.net to connect to the ODBC data source.
Under the Component properties tab, the SQL Command looks something like this.
Select ID, ADDRESS, REVISED from ADDRESS
The data type for the source columns are Integer, Varchar(30) and DATE VMS.
Now when I look at the Input and Output properties window,
The External columns has the following data types.
ID - four-byte signed integer [DT_I4]
ADDRESS - Unicode string [DT_WSTR], length = 0
REVISED - database timestamp [DT_DBTIMESTAMP]
The Output columns has the following data types
ID - four-byte signed integer [DT_I4]
ADDRESS - Unicode string [DT_WSTR], length = 0
REVISED - database timestamp [DT_DBTIMESTAMP]
When I tried to change the length of the ADDRESS on the output column, I get the following error.
Error at Data Flow Task [DataReader Source [1]]: The data type of output columns on the component "DataReader Source" (1) cannot be changed.
Error at Data Flow Task [DataReader Source [1]]: System.Runtime.InteropServices.COMException (0xC020837D)
at Microsoft.SqlServer.Dts.Pipeline.DataReaderSourceAdapter.SetOutputColumnDataTypeProperties(Int32 iOutputID, Int32 iOutputColumnID, DataType eDataType, Int32 iLength, Int32 iPrecision, Int32 iScale, Int32 iCodePage)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostSetOutputColumnDataTypeProperties(IDTSManagedComponentWrapper90 wrapper, Int32 iOutputID, Int32 iOutputColumnID, DataType eDataType, Int32 iLength, Int32 iPrecision, Int32 iScale, Int32 iCodePage)
Is this the default length for the Unicode string type. I was not able to load the ADDRESS column as it gets truncated before I load it into destination. Even if I use Derived or Data Conversion transformation, the ADDRESS is getting truncated before it reaches this transformation.
Any thoughts.
Thanks,
SK
Programmatically Changing Connections In DTS Package Causes Issue In DTS Designer
Aug 15, 2002I have an ActiveX task containing vbscript that when placed in a DTS package, will set all Connection and DataTransformation (DataPump) information correctly. Additionally, the package appears to work perfectly afterwards.
The Question:
Why when I go into the DTS Designer and open a transformation (Black Arrow) between connections - that I get the "Verifying Transformations" dialog with the three radio button options of "Remove Invalid transforamtions", "Change Source/Destination", and "Remove all transformations and redo auto-mapping"?
It appears that the SourceObjectName and SourceSQLStatements are getting correctly updated as well as the DestinationObjectName, etc.
Is there a property that is supposed to be set when I modify the source and destination properties in my code to prevent this dialog?
Thanks a bunch in advance for any assistance
Reporting Services :: Changing Credential Used For SSRS Data Source Programmatically
Jun 15, 2015I am looking command (cmd/powershell/c#) for setting/updating credential for SSRS data source.
View 2 Replies View RelatedGet Value From SQL Server 2005 Select Statement With Datareader
Nov 6, 2006I just want a simple datareader, that i can read the value returned from a select statement executed on a SQL server 2005 db. The code below should work in, but email[calc]= rdr[0].ToString(); when i want to read some data a get a exception saying:System.InvalidOperationException was unhandled by user code Message="Invalid attempt to read when no data is present." Source="System.Data" StackTrace: at System.Data.SqlClient.SqlDataReader.GetValue(Int32 i) at System.Data.SqlClient.SqlDataReader.get_Item(Int32 i) at _Default.Login_Click(Object sender, EventArgs e) in d:My DocumentsVisual Studio 2005WebSitesWebSite1Default.aspx.cs:line 47 at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) If anybody could advise me where my stupid mistake is then i would highly appreciate it! SqlConnection conn = new SqlConnection(getConnection()); SqlDataReader rdr = null; SqlCommand cmd = new SqlCommand(); cmd.CommandText = "SELECT * FROM Customer"; cmd.CommandType = CommandType.Text; cmd.Connection = conn; try { conn.Open(); rdr = cmd.ExecuteReader(); int calc = 0; Boolean login = false; string[] email = new string[100]; object[] password = new object[100]; while (rdr.HasRows) // or rdr.Read(); { rdr.Read(); email[calc]= rdr[0].ToString(); password[calc] = rdr["Password"].ToString(); if (UserName.Text.Equals(email[calc]) && Password.Text.Equals(password[calc])) { login = true; } calc++; } } finally { rdr.Close(); } thanks....
View 1 Replies View RelatedNeed To Create &&<Query&&> Statement Programmatically
Jun 2, 2006I am creating a web application that uses a using a web service to get data for my reports. Since the webservice only accepts 1 parameter called "sql" (the sql select statement), I am using the report's query string to get the data.
Here is the data source and dataset info I am using:
DataSource
Name: WebService
Type: XML
Connection string: http://localhost/myWeb/myWebService.asmx
Credentials: No credentials
DataSet
Query tab:
Name: WebService
Data source: WebService
Command type: Text
Query String: <Query><SoapAction>......</SoapAction></Query>
Here is a sample of the <Query> string that I use when I first build the report:
------------------------------------------------------------------------------
<Query>
<SoapAction>http://tempuri.org/GetDataset</SoapAction>
<Method Namespace="http://tempuri.org/" Name="GetDataset">
<Parameters>
<Parameter Name="sql" Type="String">
<DefaultValue>Select * From Customers</DefaultValue>
</Parameter>
</Parameters>
</Method>
<ElementPath IgnoreNamespaces="true">GetDatasetResponse{}/GetDatasetResult{}/diffgram{}/NewDataSet{}/Results</ElementPath>
</Query>
------------------------------------------------------------------------------
When the user selects a report in the web application, they are prompted for information about the sql statement, and then I can rebuild the <Query> xml fragment, substituting the new sql statemet for the default one. for example, the statement "Select * From Reports" would be replaced with "Select * From Customers where LN = 'Smith'".
Then I want to attach that new <Query> statement to the report and run it. How can I set this information in the report? I can't find anything that talks about it, but there must be some way!
Thanks in advance for your help!
Datareader Destination As Source For Other Datareader Source ?
Aug 30, 2006HI!
as far as I know from docs and forum datareader is for .NET data in memory. So if a use a complex dataflow to build up some data and want to use this in other dataflow componens - could i use data datareader source in the fist dataflow and then use a datareader souce in the second dataflow do read the inmemoty data from fist transform to do fursther cals ?
how to pass in memory data from one dataflow to the next one (i do not want to rebuild the logic in each dataflow to build up data data ?
Is there a way to do this ? and is the datareader the proper component ? (because its the one and only inmemory i guess, utherwise i need to write to temp table and read from temp table in next step) (I have only found examples fro .NET VB or C# programms to read a datareader, but how to do this in SSIS directly in the next dataflow?
THANKS, HANNES
Help With Datareader
Jun 8, 2007Hey guys, whats an easy way to pass a value into a stored procodure?
I tried the code below but I keep on getting a "Procedure 'sp_InsertData' expects parameter '@gpiBatchNo', which was not supplied." error. My stored proc basically gets inserts the passed variable into a databaseSqlConnection sqlSecConnection = new SqlConnection(sqlPriConnString);SqlCommand sqlSecCommand = new SqlCommand();
sqlSecCommand.Connection = sqlSecConnection;
sqlSecCommand.CommandText = "sp_InsertData";sqlSecCommand.CommandType = CommandType.StoredProcedure;sqlSecCommand.Parameters.Add("@gpiBatchNo", SqlDbType.NVarChar) ;
sqlSecConnection.Open();int returntype = sqlSecCommand.ExecuteNonQuery();
sqlSecConnection.Close();
How Can I Use Datareader
Oct 20, 2007This code is currently loading my DataGridView
How can i change this to use the Datareader
Dim myConnection As SqlConnection = New SqlConnection("Data Source=ANTEC30SQLEXPRESS;Initial Catalog=test;Integrated Security=True;Pooling=False")
Dim myCmd As SqlCommand = myConnection.CreateCommand()
myConnection.Open()
myCmd.CommandType = Data.CommandType.Text
myCmd.CommandText = "Select * From tblParts"
Dim myDataAdapter As SqlDataAdapter = New SqlDataAdapter(myCmd)
Dim myDataSet As DataSet = New DataSet()
myDataAdapter.Fill(myDataSet)
DataGridView1.DataSource = myDataSet.Tables(0)
DataReader Access
Feb 22, 2007Hi,
I am facing a problem to access datareader... actually i want to get data on lables from datareader. actually i am having one table having only one column and i hav accessed all data into datareader but the problem is that i just want to get data row by row...
For example there are four labels Label1, Label2, Label3, Label4
and want to print the data from datareader on to thease labels....
plz do reply... i am in trouble
DataReader And DataAdapter
Feb 28, 2007Hi, What is the difference b/w sqldatareader and sqldataadapter? For what purpose are they used in a database connection & how do they differ from each other? Pls explain me in detail.Regards Vijay.
View 1 Replies View RelatedDataset Or Datareader?
Jun 20, 2007i need help to know what is the best practice
i have a stored proc which returns 4 different resultselts
will that be easy to use dataset or datareader?
my purpose of using dataset/datareader is to load the data in a class
thanks.
Datareader Problem
Aug 20, 2007Hi,
I cant seem to get this working right...I have a datareader which i loop through...i want to test each value to see if its null but i cant get the syntax right.
I know i use dr.item("columnname") or dr(0) to pick a certain column but i dont know the column names and want to check them all anyway. What is the syntax to do this.
Thanks for any help...this is prob very simple but just cant see it.
--------------------------------------------While dr.Read
If dr(0) Is System.DBNull.Value Then
Return "test"End If
End While
Problem With Datareader
Aug 25, 2007Hello i creae one programm, there is an two data reader and two Gridview or datagrid , and my programm have one error my programm is there 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.Data.SqlClient;public partial class aries : System.Web.UI.Page{ SqlConnection con; SqlCommand cmd; SqlDataReader dr; SqlDataReader dr1; SqlCommand cmd1; protected void Page_Load(object sender, EventArgs e) { string str; str = ConfigurationSettings.AppSettings["DBconnect"]; con = new SqlConnection(str); con.Open(); cmd = new SqlCommand("select color from zodiac_color where Sno=1", con); dr = cmd.ExecuteReader(); GridView1.DataSource = dr; GridView1.DataBind(); cmd1=new SqlCommand("select number from zodiac_number where Sno=1",con); dr1 = cmd.ExecuteReader(); GridView2.DataSource = dr1; GridView2.DataBind(); }} i want to calll two value in a same database but the table is diffrent so please help me ?The error is ::--------- There is already an open DataReader associated with this Command which must be closed first. please help me ashwani kumar
View 2 Replies View RelatedDatareader Problem
Apr 9, 2008hi to all , check this once..this all data related to bus seats SeatNo1,SeatNo2 seats varchar in databaseSt1,St2 status(bit in database sqlserver2000) All my code is working when reader[i + 2].ToString() == "True" is remove from code ..so plz tell me solution gow to ckeck status with datareaderSqlCommand command = new SqlCommand("Select SeatNo1,SeatNo2,St1,St2 from tblSts where
BUSID='S0008'", sqlCon);
sqlCon.Open();
SqlDataReader
reader = command.ExecuteReader();
int x =
0;
while
(reader.Read())
{
for
(int i = 0; i <= reader.FieldCount - 1; i++)
{
x = (i + 1);
System.Web.UI.WebControls.Label myLabel = ((System.Web.UI.WebControls.Label)(Page.FindControl(("Label"
+ x))));
System.Web.UI.WebControls.CheckBox myCheckbox = ((System.Web.UI.WebControls.CheckBox)(Page.FindControl(("Checkbox"
+ x))));
if
(reader[i].ToString() != "NULL"
&& reader[i + 2].ToString() == "True"))
{
myLabel.Text =
reader[i].ToString();
myCheckbox.Checked = false;
}
else
{
myLabel.Text =
reader[i].ToString();
myCheckbox.Visible = false;
}
}
}
sqlCon.Close();
Datareader Timeout
Apr 25, 2008 Hi
In my web site I call all the content from the database with the use of querystrings. I use datareader to call the data each time a request appears from the querystring. Although I close all the connections I still get occasionally the following error:
Timeout expired the timeout period elapsed prior to obtaining a connection from the pool. This may have occured because all pooled connections were in use and max pool size was reached.
If it is not a programming error then what could it be? I use sql server 2005 and vs 2005 asp.net 2.0 .
Open Datareader
May 2, 2008"There is already an open datareader associated with this command which must be closed first."
I have received this same error before, but I'm not sure why I'm getting it here.'Create a Connection object.
MyConnection = New SqlConnection("...............................")
'Check whether a TMPTABLE_QUERY stored procedure already exists.
MyCommand = New SqlCommand("...", MyConnection)
With MyCommand
'Set the command type that you will run.
.CommandType = CommandType.Text
'Open the connection.
.Connection.Open()
'Run the SQL statement, and then get the returned rows to the DataReader.
MyDataReader = .ExecuteReader()
'Try to create the stored procedure only if it does not exist.
If Not MyDataReader.Read() Then
.CommandText = "create procedure tmptable_query as select * from #temp_table"
MyDataReader.Close()
.ExecuteNonQuery()
Else
MyDataReader.Close()
End If
.Dispose() 'Dispose of the Command object.
MyConnection.Close() 'Close the connection.
End With
As you can see, the connection is opened and closed, and the datareader is closed. Here's what comes next...'Create another Connection object.
ESOConnection = New SqlConnection("...")
If tx_lastname.Text <> "" Then
If (InStr(sqlwhere, "where")) Then
sqlwhere = sqlwhere & " AND lname like '" & Replace(tx_lastname.Text, "'", "''") & "%'"
Else
sqlwhere = " where lname like '" & Replace(tx_lastname.Text, "'", "''") & "%'"
End If
End If
If tx_firstname.Text <> "" Then
If (InStr(sqlwhere, "where")) Then
sqlwhere = sqlwhere & " AND fname like '" & Replace(tx_firstname.Text, "'", "''") & "%'"
Else
sqlwhere = " where fname like '" & Replace(tx_firstname.Text, "'", "''") & "%'"
End If
End If
dynamic_con = sqlwhere & " order by arr_date desc "
'create the temporary table on esosql.
CreateCommand = New SqlCommand("CREATE TABLE #TEMP_TABLE (".............", ESOConnection)
With CreateCommand
'Set the command type that you will run.
.CommandType = CommandType.Text
'Open the connection to betaserv.
ESOConnection.Open()
'Run the SQL statement.
.ExecuteNonQuery()
End With
'query our side
ESOCommand = New SqlCommand("SELECT * FROM [arrest_index]" & dynamic_con, ESOConnection)
'execute query
ESODataReader = ESOCommand.ExecuteReader()
'loop through recordset and populate temp table
While ESODataReader.Read()
MyInsert = New SqlCommand("INSERT INTO #TEMP_TABLE VALUES("......", ESOConnection)
'Set the command type that you will run.
MyInsert.CommandType = CommandType.Text
'Run the SQL statement.
MyInsert.ExecuteNonQuery()
End While
ESODataReader.Close() 'Create a DataAdapter, and then provide the name of the stored procedure.
MyDataAdapter = New SqlDataAdapter("TMPTABLE_QUERY", ESOConnection)
'Set the command type as StoredProcedure.
MyDataAdapter.SelectCommand.CommandType = CommandType.StoredProcedure
'Create a new DataSet to hold the records and fill it with the rows returned from stored procedure.
DS = New DataSet()
MyDataAdapter.Fill(DS, "arrindex")
'Assign the recordset to the gridview and bind it.
If DS.Tables(0).Rows.Count > 0 Then
GridView1.DataSource = DS
GridView1.DataBind()
End If
'Dispose of the DataAdapter
MyDataAdapter.Dispose()
'Close server connection
ESOConnection.Close() Again, a separate connection is open and closed.I've read you can only have 1 datareader available per connection. Isn't that what I have here? The error is returned on this line: MyInsert.ExecuteNonQuery()
Help is appreciated.
Datareader And Dataset
Nov 3, 2003Hi
I am using a datareader to access data via a stored procedure. The reason for using the datareader is that the stored procedure is multi level depending on the variable sent to it. However I want to do two things with the data being returned.
The first is to poulate a datagrid - which I've done.
The second is to produce an Infragistic Web Graph. However according to the background reading I have done so far, I can only populate the graph from one of the following: datatable,dataview,dataset,Array or Ilist.
I don't want to make another call to the server for the same information, so how can I get the data out of a stored procedure into a dataset or dataview?
regards
Jim
DataReader Not Reading
Jan 13, 2004Why won't this dataReader read?
Dim objCon2 As New SqlConnection()
objCon2.ConnectionString = "a standard connection string"
objCon2.Open()
Dim objCommand As SqlCommand
objCommand = New SqlCommand(strSQL, objCon2)
Dim objReader As SqlDataReader
objReader = objCommand.ExecuteReader()
Label1.Text = objReader("email")
strSQL is a select command which I've checked (using SQL Query analyzer) does return data. I know the connection string is valid (and I presume if it wasn't that it'd fail on objCon2.open, which it doesn't).
So why oh why do I get this error on the last line (and yes, there is an "email" field in the contents of the reader)
System.InvalidOperationException: Invalid attempt to read when no data is present.
Datareader And Arrays
Apr 22, 2004I have data I am retrieving using a datareader...and SQLSERVER
It could return 1 row of information or perhaps 3 rows of information
I need to know how to use an array here I would guess so I can access each element in this row or rows.
HOw might I use reader.read and get it into the array
Clarification On DataReader
Jan 19, 2006I want to create a DataList that shows products, which will be on
multiple pages. I have my stored proc to show paged results, which
contains a return value for more records.
I have found examples of coding the DataReader, defining all the
parameters etc, but what about the drag and drop SqlDataSource?? You
can select the DataSource Mode to be "DataReader". I can put select
parameters in, with input and my return value. I don't know how to then
access the return value, or output value if needed, from this? My
DataList references the SqlDataSource, but I don't know how to get the
return/output value out??? This is very frustrating, cause I can't find
any info about it anywhere. Always input parameters, but no output.
This is my current SqlDataSource...
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
DataSourceMode="DataReader" ConnectionString="<%$
ConnectionStrings:Personal %>" SelectCommand="sp_PagedItems"
SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:QueryStringParameter Name="Page" QueryStringField="page" />
<asp:Parameter Name="RecsPerPage" DefaultValue="10" />
<asp:QueryStringParameter Name="CategoryID" QueryStringField="cat"
/>
<asp:Parameter Name="RETURN_VALUE" Direction="ReturnValue" Size="1"
/>
</SelectParameters>
</asp:SqlDataSource>
If I take out the RETURN_VALUE Parameter, my results display in my data
list, but that's useless if I can't access the return value to
determine the remaining number of pages etc. Is my RETURN_VALUE
parameter wrong? How do I access that? My stored proc is shown below...
CREATE PROCEDURE sp_PagedItems
(
@Page int,
@RecsPerPage int,
@CategoryID int
)
AS
-- We don't want to return the # of rows inserted
-- into our temporary table, so turn NOCOUNT ON
SET NOCOUNT ON
--Create a temporary table
CREATE TABLE #TempItems
(
ID int IDENTITY,
No varchar(100),
Name varchar(100),
SDescription varchar(500),
Size varchar(10),
ImageURL varchar(100)
)
-- Insert the rows from tblItems into the temp. table
INSERT INTO #TempItems (No, Name, SDescription, Size, ImageURL)
SELECT No, Name, SDescription, Size, ImageURL FROM Products WHERE CategoryID=@CategoryID
-- Find out the first and last record we want
DECLARE @FirstRec int, @LastRec int
SELECT @FirstRec = (@Page - 1) * @RecsPerPage
SELECT @LastRec = (@Page * @RecsPerPage + 1)
-- Now, return the set of paged records, plus, an indiciation of we
-- have more records or not!
SELECT *,
MoreRecords =
(
SELECT COUNT(*)
FROM #TempItems TI
WHERE TI.ID >= @LastRec
)
FROM #TempItems
WHERE ID > @FirstRec AND ID < @LastRec
-- Turn NOCOUNT back OFF
SET NOCOUNT OFF
RecordCount With Datareader
Apr 22, 2006I am very disappinted where Datareader have no RecordCount where I can get the total records it read. I guess I found a way:
sql = "SELECT *, ROW_NUMBER() OVER (ORDER BY id DESC) AS c FROM ACCOUNTS ORDER BY c DESC"Dim command As SqlCommand = New SqlCommand(sql, New SqlConnection(_DBConnectionString)) command.Connection.Open() _ReturnDataReader = command.ExecuteReader(CommandBehavior.CloseConnection) command.Dispose() _TotalRecord = _ReturnDataReader.GetInt64(_ReturnDataReader.GetOrdinal("c"))
Have SQL Server 2005 count for me....
Datareader Security
Jun 15, 2007As a beginner, I'm attempting to set up security for SQL Server But it's not working and am fairly confused at the moment.
The current problem is to do with getting SQL Security logins to work. I've added a login for a 'reader' user (no updates allowed) and have set the database user to use only the 'db_datareader' role. Yet, when I logon as that user, I can update data without a problem.
The system is a standalone PC using XP Pro with SQL Express installed.
The connection string is valid (and works, allowing access to all data) and is of the type:
"server=xxxxx;database=xxxx;Trusted_Connection=True;"
The application is written is VB.NET
I hope I'm making some simple mistake here and I'd really appreciate any thoughts ...
Many thanks
DataReader.GetFloat From SQL DB
Apr 22, 2008
Hi All,
I am the following problem retrieving Float data from a Compact SQL database, it worked perfectly with 1.1 .Net CF, but since updating to 2.0 .Net CF its crashing with a "InvalidCastException" Error, have checked the DB its a Float...
// Start of code snip
cmd = conn.CreateCommand();
string cmdString ="select " +
RECORDNUMBER_COLUMN + ", "
+ FULLNAME_COLUMN + ", "
+ FPFILENAME_COLUMN + ", "
+ IMAGENAME_COLUMN + ", "
+ BMPNAME_COLUMN + ", "
+ TEMPLATENAME_COLUMN + ", "
+ SCORE_SCORE_COLUMN + " "
+ "from " + ENROLTABLE_NAME + " where " + RECORDNUMBER_COLUMN + " = " + iNumber;
cmd.CommandText = cmdString;
SqlCeDataReader DataReader = cmd.ExecuteReader(System.Data.CommandBehavior.SingleResult);
while(DataReader.Read())
{
recordnumber = DataReader.GetInt32(DS_WORD_COLUMNINDEX_RECORDNUMBER);
fullname = DataReader.GetString(DS_WORD_COLUMNINDEX_FULLNAME);
fpdataname = DataReader.GetString(DS_WORD_COLUMNINDEX_FPFILENAME);
fpimagename = DataReader.GetString(DS_WORD_COLUMNINDEX_IMAGENAME);
personbmpname = DataReader.GetString(DS_WORD_COLUMNINDEX_BMPNAME);
persontemplatename = DataReader.GetString(DS_WORD_COLUMNINDEX_TEMPLATENAME);
//*******************************************************
Score_Score = DataReader.GetFloat(DS_WORD_SCORE_COLUMNINDEX_TEMPLATESCORE);
// This generates the error : "InvalidCastException"
//*******************************************************
ReturnValue=true;
}
DataReader.Close();
conn.Dispose();
cmd.Dispose();
// End Of Snip
Cheers for any help with this
Adz
SQL Command Datareader
Jul 31, 2007I have the following SQL statement in the DataReader.SQLCommand.
select * from myTable where DataEdited > 'some hard coded date data'
I want to read the above 'some hard coded date data' from a table sitting in different database which is not the same server where the DataReader is connected.
How to do that?
I can populate the 'some hard coded date data' to a SSIS variable but do not know how to embed that in the SQL statement.
Thank you for your thoughts.
Smith
DataReader And Bad Dates
Aug 9, 2006Hello,
I am using a DataReader to read an ODBC Data Source.
Some of my dates are not valid. I would like to have the DataReader just treat the bad dates as Null. However I cannot seem to find a setting that will get me past the DataReader.
In SQL 2000 DTS I was able to use a script to skip the bad dates.
Please help because I don't want to have to run SQL 2000 DTS on SQL 2005.
Thanks,
Michael
Datareader Does Not Return Result
Feb 23, 2007the following is the code,....When i run this code I get "Invalid operation exception", Trying to read when no data is present, but the query returns result in query analyser...can anyone suggest what the problem is ...
Connection is open and the query is simple select statement
SqlCommand myCommand = new SqlCommand(query,myConnection);
myConnection.Open();
SqlDataReader myReader = myCommand.ExecuteReader();
Thanks
Niranch
About Datareader And Dataset Combine Use
Dec 26, 2007i have 2 database queries. One fetches data from a table and other according to first query result second query fetches record from another table both of these queries make use of datareader and while loop for inserting data to dropdownlist , but instead of that i want to add all my row fetched by second query store one by one in a dataset for some time .in simple words i want to insert datareader record one by one in dataset. i am using asp.net2.0,c#, Sql server 2000
View 2 Replies View RelatedHow To Add Datareader Results To A Label
Feb 21, 2008hi,
i have this code it gets the records from db
i need to add the results of the datareader to a label but label control does not have a datasource property
second problem is how to comma separate the results.with array? or what please help
i need to show the results like this: record1,record2,record3Dim Conn As New SqlConnection(ConfigurationManager.ConnectionStrings("Conn").ConnectionString)
Dim strSQL As StringDim dr As SqlDataReader
Dim userID As Integer = Session("cmmLogonUserID")
strSQL = "select id,extension from musicExt"Dim cmd As New SqlCommand()cmd = New SqlCommand(strSQL, Conn)
Conn.Open()
dr = cmd.ExecuteReader()
'txtMediaFormats.Text = dr ???????
' ddlGenres.DataBind() ????????
Conn.Close()
Open DataReader Error
Apr 16, 2008Looking at the below code you can see that I have a separate Connection for each Insert Statement.'OPEN CONNECTION TO ESOSQL
MyConnection = New SqlConnection("......")
MyConnection.Open()
'check if there are existing charges for this person. The user must enter in atleast 1 charge before proceeding with arrest insert.
MyCheck = New SqlCommand("SELECT * FROM ARREST_CHARGES WHERE ARRESTNO = '" & Session("uid") & "'", MyConnection)
MyCheck.CommandType = CommandType.Text
MyDataReader = MyCheck.ExecuteReader
If MyDataReader.HasRows Then
MyConnection1 = New SqlConnection("...")
MyConnection1.Open()
MyInsert = New SqlCommand("INSERT INTO ARREST_INDEX (ARRESTNO, NOTES) VALUES ('" & Session("uid") & "','" & tx_notes.Text & "')", MyConnection1)
MyInsert.CommandType = CommandType.Text
MyInsert.ExecuteNonQuery()
MyConnection1.Close()
MyConnection2 = New SqlConnection("....")
MyConnection2.Open()
MyOtherInsert = New SqlCommand("INSERT INTO ARREST_COMMENTS (ARRESTNO, NOTES) VALUES ('" & Session("uid") & "','" & tx_notes.Text & "')", MyConnection2)
MyOtherInsert.CommandType = CommandType.Text
MyOtherInsert.ExecuteNonQuery()
MyConnection2.Close()
Label1.Text = ""
Else
div1.Style.Add("display", "block")
Label1.Text = "You must enter charges before proceeding."
End If
MyConnection.Close()One would think I should only have to use one connection. However, if I use only one I get this error:There is already an open DataReader associated with this Command which must be closed first. 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.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first.Source Error: Line 60:
Line 61: MyInsert.CommandType = CommandType.Text
Line 62: MyInsert.ExecuteNonQuery()
Line 63:
Line 64: ' MyConnection1.Close()The only way I could get rid of it was to encapsulate each individual INSERT statement within its own connection. This seems to me as very inefficient. Can anyone explain why I couldn't just use one connection?Thanks.
How To Retrieve Value From DataReader Which Come From Function ?
May 5, 2008Hi...
I made some code which is to return DataReader.
And then I want to use it in other procedure. But I don't know how to extract value from Reader.
Public Function GetMyProfile(ByVal uid As string) As SqlDataReader
Using conn As New SqlConnection(ConnString)
.
.
Dim Reader As SqlDataReader = cmd.ExecuteReader()Return Reader.RecordsAffectedcmd.Dispose()End UsingEnd Function
Sub Button_Click()
dim dr as SqlDataReader
dr=GetMyProfile(ByVal uid As string)
....Is it right way ?
End Sub