Writing A Conditional Save Method Using SqlCommand
Apr 11, 2006
Hi,
I'm trying to write a Save method which is conditional based on the form fields which the user has completed. I'm using the SqlCommand to write the Save method.
I'd like to be able to only save the form fields which the user have completed, but I'm not sure what is the better option. Whether to check which fields have been filled in and have different methods for each form field. Is there a better way to write a conditional save method?
Stephen
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Sep 21, 2006
Hi,I'm new to ASP.NET, and am currently looking into XML.I'm trying to write XML using data from an SQL Server 2000 table. But I seem to be getting the following error regarding the SQL Server connection:Compiler Error Message: CS1502: The best overloaded method match for 'System.Data.SqlClient.SqlCommand.SqlCommand(string, System.Data.SqlClient.SqlConnection)' has some invalid argumentsSource Error:Line 23: {
Line 24: SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
Line 25: mySqlDataAdapter.SelectCommand = new SqlCommand(queryString, connString);
Line 26: mySqlDataAdapter.Fill(myDataSet);
Line 27: return myDataSet;Source File: c:InetpubwwwrootmappingcreateGeoRSSFile.aspx.cs Line: 25 This is my code:using System;
using System.Data;
using System.Data.SqlClient ;
using System.Configuration;
using System.Collections;
using System.Text;
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.Xml;
public partial class createGeoRSSFile : System.Web.UI.Page
{
protected void Page_Load(object sender, DataSet myDataSet, EventArgs e)
{
string connString = "server=SQLSERV1;database=Historical_Statistics;UID=dbuser;PWD=Password";
string queryString = "SELECT Town, PostCode, Latitude, Longitude FROM UKPostCodes";
using (SqlConnection mySqlConnection = new SqlConnection(connString))
{
SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
mySqlDataAdapter.SelectCommand = new SqlCommand(queryString, connString);
mySqlDataAdapter.Fill(myDataSet);
return myDataSet;
}
// Create a new XmlTextWriter instance
XmlTextWriter writer = new XmlTextWriter(Response.OutputStream, Encoding.Unicode);
// Start writing!
writer.WriteStartDocument();
writer.WriteStartElement("item");
// Creating the <town> element
writer.WriteStartElement("town");
writer.WriteElementString("PostCode",myDataSet .Tables[1].Columns("PostCode"));
writer.WriteElementString("geo:lat",myDataSet.Tables[1].Columns("Latitude"));
writer.WriteElementString("geo:lon", myDataSet.Tables[1].Columns("Longitude"));
writer.WriteEndElement();
writer.WriteEndElement();
writer.WriteEndDocument();
writer.Flush();
writer.Close();
}
}What seems to be causing this error?Thanks.
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May 2, 2007
Hi there,
Is there a way to programmatically save a RS results into Excel format using the render method ?
I had read about that capability but I can't seem to find any sample code on how to do it. Is this a parameter that you have to set in the render method ?
Any suggestion or tips are much appreciated !
Thanks !
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Feb 10, 2008
Hi
Is it possible To pass an SQL command to a ASp.net web service as system.data.SQLclient.sqlcommand?
That means is ispossible to pass the actuall sql command instead of just the string?
If yes how can you do that??
Cheers
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May 10, 2007
Hi,I am trying to write a method which needs to call a stored procedure and then needs to get the response of the stored procedure back to the variable i declared in the method. private string GetFromCode(string strWebVersionFromCode, string strWebVersionString) { //call stored procedure } strWebVersionFromCode = GetFromCode(strFromCode, "web_version"); // is the var which will store the response.how should I do this?Please assist.
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Feb 11, 2006
Hello:I didn't find any documentation that notes save point names are casesensitive, but I guess they are...Stored Proc to reproduce:/* START CODE SNIPPET */If Exists (Select * From sysobjects Where Type = 'P' and Name ='TestSaveTran')Drop Procedure dbo.TestSaveTranGoCreate Procedure dbo.TestSaveTranAsBeginDeclare@tranCount int--Transaction HandlingSelect @tranCount = @@TRANCOUNTIf (@tranCount=0)Begin Tran localtranElseSave Tran localtranBegin Try--Simulate Error While ProcessingRAISERROR('Something bad happened', 16, 1)/*If this proc started transaction then commit it,otherwise return and let caller handle transaction*/IF (@tranCount=0)Commit Tran localtranEnd TryBegin Catch--Rollback to save pointRollback Tran LOCALTRAN --<< NOTE case change--Log Error--Reraise ErrorEnd CatchEndGo--Execute Stored ProcExec dbo.TestSaveTran/*Should receive the following message:Cannot roll back LOCALTRAN. No transaction or savepoint of that namewas found.*//* END CODE SNIPPET */What is really strange, if there is a transaction open, then no erroris thrown. So if you execute as so:/* START CODE SNIPPET */Begin Tran--Execute Stored ProcExec dbo.TestSaveTran/* END CODE SNIPPET */There is no "Cannot roll back LOCALTRAN...." message.Questions:1-)Can someone confirm save point names are case sensitve and this isnot happening because of a server setting?2-)Is this a logic error that I am not seeing in the example codeabove?We have changed our code to store the save point name in a variable,which will hopefully mitigate this "problem".Thx.
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Jan 29, 2008
Hi,
I just have a Dataset with my tables and thats it
I have a grid view with several datas on it
no problem to get the data or insert but as soon as I try to delete or update some records the local machine through the same error
Unable to find nongeneric method...
I've try to create an Update query into my table adapters but still not working with this one
Also, try to remove the original_{0} and got the same error...
Please help if anyone has a solution
Thanks
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Jun 26, 2007
I am new to sql sever management studio express, but a long time query analyzer user. This is a very basic question.
I want to change the default directory in sql server management studio express so that when I go to save a query, it is already pointed to the correct one. Where do I change that?
Thanks,
Nanci
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Mar 7, 2008
Hello everyone,
Is there a way in order to execute a subscribed report based on a certain criteria?
For example, let's say send a report to users when data exist on the report else if no data is returned by the query
executed by the report then it will not send the report to users.
My current situation here is that users tend to say that this should not happen, since no pertinent information is contained in the report, why would they receive email with blank data in it.
Any help or suggestions will be much appreciated.
Thanks,
Larry
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Jan 8, 2007
Hi guys. I'm having trouble declaring an sqlcommand. What I want to do is declare a global sqlcommand and I would want this sqlcommand to vary depending on the conditions on my page_load.
Here's the code....
Dim p_s_syounin2 As New SqlCommand
Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If (Session("syozokubu_id") = 20) And (Session("syozokuka_id") = 21) And ((Session("kaikyuu_id") = 23)) Then
p_s_syounin2 = ("INSERT INTO (p_s_syounin2) SELECT syain_hnm FROM TR_syainID WHERE TR_syainID.syozokubu_id=20 AND TR_syainID.syozokuka_id=21 AND TR_syainID.kaikyuu_id=23, cnn") '''' THIS DOES NOT WORK!
End If
End Sub
p_s_syounin2 .ExecuteNonQuery()
What is the correct way of declaring p_s_syounin2?
Thanks.
Best Regards,
Audrey
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Oct 19, 2006
Is it ok to re-use a SqlCommand object? In a method, I am executing 2 separate parameterized sql statements. Before I run the second, I will clear the command objects parameters.(command.parameters.clear()) I'm just checking to see if it is good coding practice or not. thanks,SC
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Mar 6, 2007
I created an xmldocument which I would like to insert in a db field with the data type XML.The following code is giving me the error:System.Data.SqlClient.SqlException: XML parsing: line 1, character 38, unable to
switch the encoding SqlCommand cmdUpdate = new SqlCommand("sp_AddHistory", sqlConnection); cmdUpdate.CommandType = CommandType.StoredProcedure; cmdUpdate.Parameters["@FieldsChanged"].Value = xmlDoc.innerXML; // don't know whether this is good cmdUpdate.ExecuteNonQuery(); innerXML:<?xml version="1.0" encoding="utf-8"?><Fields> <Field> <FieldName>comp_Area</FieldName> <OldValue>Area 52</OldValue> <NewValue>Area 51</NewValue> </Field></Fields> The XML seems fine.. any ideas?
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May 10, 2007
Hi! I need to know what can I do to use a variable in the WHERE condition of the sqlcommand as I show you: current_user = User.Identity.Name
Dim cmd As New SqlCommand("SELECT [id_usuario], [nombre], [apellidos], [telefono], [empresa] FROM [usuario] WHERE [id_usuario] = current_user", cn) Obviously it doesn't work and I need your help. Thanks.
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Oct 17, 2007
Hello,
I am trying to insert a value into a specific row in a table. The error comes from the myCommand2 statement but i don't know how to solve it. Please help!
My code is as follows:SqlCommand myCommand = new SqlCommand("select count(*) from updatetable", myConnection);
myReader = myCommand.ExecuteReader();
while (myReader.Read())
int count = myReader.GetInt32(0);
SqlCommand myCommand2 = new SqlCommand("insert into interface (Total) where description = 'Graphicads' value ( " + count + ")", myConnection2);myCommand2.CommandType = CommandType.Text;
myCommand2.ExecuteNonQuery();
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Oct 26, 2007
Hi,When using the following controls....System.Data.SqlClient.SqlConnection System.Data.SqlClient.SqlCommandIf I want to change my SQL command and execute the query once again what cleanup do I need to do first?Do I need close and dispose the SqlConnection?Do I need to dispose the SqlCommand?Can I use the SqlConnection for more than one SqlCommand?Thanks,Scott
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Nov 23, 2007
Hello all, when I write my CommandText, It displays it as insert into videos values (127.0.0.1, 4000, 434), which the ip address is sent int as a string, put i keep getting an error, and I think it is because it is wanting an string, but it is sending in these "." or something, anyways heres my method, I dont know how I can add " " around the ip when i pass it in, since it is a string. thanks.
1 [WebMethod]
2 public void Register(string ip, int port, int[] handles)
3 {
4 SqlConnection dbConn = new SqlConnection(connStr);
5 SqlCommand comm = new SqlCommand();
6 comm.Connection = dbConn;
7 dbConn.Open();
8 for (int i = 0; i < handles.Length; i++)
9 {
10 comm.CommandText = "insert into videos values (" + ip + ", " + port + ", " + handles[i] + ")";
11 comm.ExecuteNonQuery();
12 }
13 dbConn.Close();
14 }
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Mar 12, 2008
Using SqlCommand, this is how I am updating a database table:
Sub UpdateDataGrid(obj As Object, ea As DataGridCommandEventArgs) strSQL = "UPDATE Basket SET Quantity = Qty, Total = TotAmt WHERE BasketID = BID AND ProductID = PID" sqlCmd = New SqlCommand(strSQL, sqlConn) With sqlCmd .Parameters.Add("Qty", SqlDbType.Int).Value = CInt(iQty) .Parameters.Add("TotAmt", SqlDbType.Money).Value = CInt(iQty) * CType(ea.Item.FindControl("lblPrice"), Label).Text .Parameters.Add("BID", SqlDbType.VarChar, 50).Value = strBasketID .Parameters.Add("PID", SqlDbType.VarChar, 50).Value = CType(ea.Item.FindControl("lblID"), Label).Text End With sqlConn.Open() sqlCmd.ExecuteNonQuery() sqlConn.Close()End Sub
But the above code generates the following error pointing to the red colored line in the above code:
Invalid column name 'BID'.Invalid column name 'PID'.
BID & PID are not the column names in the actual database table but can't it be done in the way I have done above? In fact, Qty & TotAmt are not the column names in the actual database table as well; so why isn't the error pointing to Qty & TotAmt as they will be evaluated before BID & PID, if I am not mistaken?
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Apr 15, 2008
How can I check if the ( SqlCommand ) return empty values
Can some one write code for this, I want know it is return Null values or not
thanx ....
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Feb 19, 2006
I want to do something like the following but I get an error: Object reference not set to an instance of an object. SqlConnection sqlConnection = new SqlConnection("server=xxxxx"); SqlCommand [] cmd = new SqlCommand[3]; Object returnValue; cmd[0].CommandText = "DO QUERY"; cmd[1].CommandText = "DO QUERY"; cmd[2].CommandText = "DO QUERY"; cmd[3].CommandText = "DO QUERY"; } sqlConnection.Open();int i = 0;while(i<4){ cmd[i].CommandType = CommandType.Text; cmd[i].Connection = sqlConnection; cmd[i].ExecuteNonQuery(); returnValue[i] = cmd[i].ExecuteScalar();i++} sqlConnection.Close();How should I do the followingThanks
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Mar 7, 2006
How to test @au_lname's value sends to the following following sql command?
Dim MyCommand As New SqlCommand("UPDATE [authors] SET [au_lname] = @au_lname", MyConnection)MyCommand.Parameters.Add(New SqlParameter("@au_lname", SqlDbType.NVarChar)).Value = me.au_lname.text
I tried to print the "MyCommand.CommandText.ToString" but only get UPDATE [authors] SET [au_lname] = @au_lname with no value in the command text.
Thanks!
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May 4, 2006
Is there documentation on what ExecuteScalar() will return if the SQL statement is returning an image?
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May 17, 2006
Hi:
I am using sqlcommand.parameters.add() and up to 74 parameters for one sqlcommand, it gets the error "too many parameters for the sqlcommand", I wonder if someone know is there limitation of the paramters that I can pass to sqlcommand? If so, how many parameters I can pass to the sqlcommand at one time?
thank u in adv.
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May 30, 2006
Hello,I was trying to do the following: Dim cmd As SqlCommand Dim objConnection As SqlConnection objConnection = New SqlConnection = Web.configwhere the We.config is where my connection string is set. but I get a sintax error in the Web.config line.is it possible to asign the value of the web.config content to the new sql connection?thanks for any suggestions.
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Dec 15, 2006
I have the following code in the color property of a textbox. However, when I run my report all of the values in this column display in green regardless of their value.
=SWITCH(Fields!Wrap.Value >= 3, "Red", Fields!Wrap.Value < 3, "Green")
I already tried =iif(Fields!Wrap.Value >= 3 , "Red", "Green") and got the same results.
Is it because this is a matrix report? What am I doing wrong?
Thanks in advance . . .
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Aug 1, 2006
I am trying to add a DateTime? parameter to SqlCommand. It works when the variable has a value, but when its null, an exception gets thrown saying that parameter was not supplied.What is causing this error?
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Jan 29, 2007
Hi
Just a doubt: s it possible to write an ado.net code that uses a sqldataadpter object and a sqlcommand object ( BOTH OBJECTS, IS IT POSSIBLE?) to retrieve data from the database by calling a stored procedure.
Thanks a lot
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May 18, 2007
Can't seem to pass a variable to the sql statement. I'd appreciate any help. I'm trying to pass pColName to CommandText = "ALTER TABLE tb_roomInfo ADD @rColName varchar(50);";Doesn't seem to work though. CODE: [WebMethod] public string addCol(string pColName) { SqlConnection cnn = new SqlConnection(connString); try { cnn.Open(); SqlCommand cmd = new SqlCommand(); cmd.Connection = cnn; cmd.CommandText = "ALTER TABLE tb_roomInfo ADD @rColName varchar(50);"; SqlParameter rColName = new SqlParameter("@rColName", pColName); cmd.Parameters.Add(rColName); int i = cmd.ExecuteNonQuery(); cnn.Close(); return "Insert Successful"; } catch { return "Insert Unsuccessful"; } }
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Oct 16, 2007
With VS2005, there is a new component SqlDataSource, <asp:SqlDataSource ID="SqlDataSource1" runat="server"></asp:SqlDataSource> Then you can assign SP and bind datasource to a get data for this component in .NET code:SqlDataSource1.SelectCommand = "spName"SqlDataSource1.SelectCommandType = SqlDataSourceCommandType.StoredProcedure SqlDataSource1.ConnectionString = Comm.connString There is no way to set sqlcommand timeout for this stored procedure like SqlClient.SqlCommand. How can I do this?
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Jan 23, 2008
Hi,
I would like to know how I can retrieve the ID (Primary key) of the row I just inserted with a sqlcommand(text not stored procedure).
Thx
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Mar 24, 2008
Hi, I've come from desktop to web (say no more?)
I'd like to fire a sqlCommand.StatementCompleted event in ASP.NET & use the sender argument to retrieve the output of a stored proc.
The command is in a button event. The event handler += is also set up in the same button event. Naturally the event handler proc is separate as its own procedure
In the event handling procedure, I cast the sender arg. to an SQLCommand object & try to extract the value of the output parameter.
When I try to do this I get a "No reference set to object" error raised in . Is this because there was a post back after the command completed & the Command object lost its state? If so, what would be the best way to retain the parameters value? Using session state or Profile?
Any help would be greatly appreciated
below is cut down code as to what I'm doing:protected void Button1_Click(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand();
cmd.StatementCompleted += new StatementCompletedEventHandler(c_StatementCompleted); cn.Open(); cmd.ExecuteNonQuery(); cn.Close();
}
void c_StatementCompleted(object sender, StatementCompletedEventArgs e)
{
// get an error here
string result = ((SqlCommand)sender).Parameters["returnPrm"].Value.ToString();
}
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Mar 27, 2008
I try to get the value return from GetRandomPosition StoredProc, and it throws a statement saying incorrect syntax.
Error:
Line 1: Incorrect syntax near 'GetRandomPosition'.
Mark up:
myPuzzleCmd.Execute is used in Classic ASP and it works just fine.
I tried to subsitute with ExecuteReader / ExecuteScalar / ... etc, none of them fix it.
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Mar 31, 2008
Hi Dear Sir,I have some problem:SqlCommand.CommandTimeout not support.My SQL Query: public static List<Subject> GetAllSpecificUrlSubject(int memberId) {
string sql = string.Concat("SELECT distinct S.subject_id as 'id',
cast(S.subject_raw as varchar(8000)) as 'subject' FROM STATEMENT
S,Custom_Blogs B INNER JOIN onsurvey.member_custom_blogs M ON
B.Blogs_ID=M.Blogs_Id where M.MemberId="+ memberId +" and
cast(S.blog_url as varchar(8000)) like '%'+ cast(B.Url as
varchar(8000)) COLLATE SQL_Latin1_General_CP1_CI_AS +'%' group by
S.Subject_Id,cast(S.Subject_Raw as varchar(8000))"); List<Subject> list; using (SqlConnection conn = OLSUtils.DBUtils.SqlConnectionUtils.GetNewConnection()) { using (SqlCommand cmd = conn.CreateCommand()) { cmd.CommandText = sql; cmd.CommandType = CommandType.Text; //cmd.CommandTimeout = 300; conn.Open();
cmd.CommandTimeout = 300;
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Apr 2, 2008
what property should i assign to myPuzzleCmd2 ?
myConnection.Open()
Dim myPuzzleCmd2 As New SqlCommand("GetRandomCode", myConnection)
myPuzzleCmd2.CommandType = CommandType.StoredProcedure
Dim retLengthParam As New SqlParameter("@Length", SqlDbType.TinyInt, 6)
retLengthParam.Direction = ParameterDirection.Input
myPuzzleCmd2.Parameters.Add(retLengthParam)
Dim retRandomCode As New SqlParameter("@RandomCode", SqlDbType.VarChar, 30)
retRandomCode.Direction = ParameterDirection.Output
myPuzzleCmd2.Parameters.Add(retRandomCode)
Try
Dim reader As SqlDataReader = myPuzzleCmd2.ExecuteReader()
myPuzzleCmd.ExecuteNonQuery()Catch ex As Exception
myPuzzleCmd2 = Nothing
Session.Remove("RandomCode")
HttpContext.Current.Session("RandomCode") = myPuzzleCmd2("@RandomCode") < --------- Over here
Finally
myConnection.Close()
End Try
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