I'm trying to determine whether it is better to declare the connection outside with it's own using statement or to create it inside the sqlcommand itself. This is in regards to a single command interaction with the database (no loops).
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Or
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can capture return value from a SQL by using SqlConnection SqlCommand
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Declaring the SqlConnection and SqlCommand objects in a webform without CodeBehind I am trying to query data from a MS SQL server with a C# web form without "CodeBehind". I want to write the information to a table in the web form's body.
I am having trouble declaring the SqlConnection and SqlCommand objects that connect to the server.
How do you use "using System;", "using System.Data;", "using System.Data.SqlClient" inside the script element of an .ASPX file?
(code below)
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i have 5 methods in classA. each and every methods i have open the sqlconnection and close it, instead of that is there anyway to create a sqlconnection at one time if its opened then no need to create a new connection, if its closed then we have to connect.
View 5 RepliesIs it possible to use a pre-existing ConnectionString in this construction?
myConnection = New SqlConnection("server=localhost;" & "database=pubs;Trusted_Connection=Yes")
Regards -Penn
I have a whole bunch of data access methods where in each one I am doing this
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and them moving on with my SqlCommand and SqlDataReader and so on.Is this creating to many instances of an SQLConnection?I was thinking doing this instead. Creating a SqlConnection Manager which would look like this
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and then in my database access methods
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Is this a good or bad idea and why?Also would this even be neccesary?
i am making a simple cms system
but I have a problem when updating some information
here is the code
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and in the page load everything is fine
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'SqlConnection' is not defined in the behind code as follows:
Source Error:
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Source File: I:WebsitesCMPHostFox BackupDefault.aspx.vb Line: 24
Snippet reads as follows:
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I want to add array list in sqlcommand.but i don't no how to pass it. My code is.
ArrayList
ProductId = new
ArrayList();
for (int i = 0; i < ShipmentPackage.Items.Count; i++)
{
ProductId.Add(ShipmentPackage.Items[i].ProductVariant.ProductID);
}
select * from TableName where id= ProductId(ProductId is my Arraylist)
i want to ask how to i set variable in asp:sqldatasource in sqlcommand in asp.net c#....
This is my code
asp.net
<dx:ASPxListBox ID="lsAssignToko" runat="server" DataSourceID="SqlDataSource6"
TextField="NAMA" ValueField="ID" AutoPostBack="true"
EnableCallbackMode="True" SelectionMode="CheckColumn"
OnSelectedIndexChanged="lsAssignToko_SelectedIndexChanged">
<Columns>
<dx:ListBoxColumn FieldName="ID"/>
<dx:ListBoxColumn FieldName="NAMA" />
</Columns>
</dx:ASPxListBox>
<asp:SqlDataSource ID="SqlDataSource6" runat="server"
ConnectionString="<%$ ConnectionStrings:Ora2010 %>"
ProviderName="<%$ ConnectionStrings:Ora2010.ProviderName %>"
SelectCommand="SELECT ID, NAMA FROM REF_TOKO WHERE ID IN ( :inTOKO ) ORDER BY NAMA">
<SelectParameters>
<asp:SessionParameter Name="inTOKO" SessionField="inTOKO" Size="200" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
c#
string dummy = "";
string data = "";
string inTK = "";
string inTOKO = "";
//string inTOKO1 = "";
int pot;
for (int i = lsToko.SelectedItems.Count - 1; i >= 0; i--)
{
string tok = lsToko.SelectedItem.Text.ToString();
data = lsToko.SelectedItem.Value.ToString();
dummy = dummy + "" + data + ",";
int index = lsToko.SelectedItem.Index;
lsToko.Items.RemoveAt(index);
}
if (lsToko.SelectedItems.Count <= 1)
{
inTK = dummy.Length.ToString();
pot = int.Parse(dummy.Length.ToString()) - 1;
inTOKO = dummy.Substring(0, pot);
}
Session["inTOKO"] = inTOKO;
the problem is where in my variable inTOKO consist of couple of value...
Example
while variable inTOKO = one value success but while value inTOKO = two value error
inTOKO = 1101111 => success
inTOKO = 1101111,1211321 => not success
i have the followng code:
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Now what I want is how can I print the complete sql statement and try to run it in sql query of
Sql server. How can I print Sql statement from sqlcommand. the cmd.commandtext seems notworking.
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is used for update, insert and delete operations.Besides the fact
I am using "ASP .Net 2.0" with "SQL Server 2005". What is better and preffered approach towards making a sqlconnection to interect with database?
1. To open new connection each time we need to interact with DB and then close the connection
2. Or to make a shared database connection for whole web application.
I know you can point to a OnSelecting event on the aspx page datasource. But I've created my SqlDataSource in the code behind. Is there any way to point to a selecting event in the code behind (I need this to provide the parameters)? Or should I just include all my logic in the Page_Load event (where I keep my SqlConnection)Here's what I have so far:
protected void Page_Load(object sender, EventArgs e)
{
SqlCommand myCommand = new SqlCommand();
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how to write code for database transaction(eg; Insert,delete,update) i want to write a better code
eg:sqlcommand.Commandtext="some sql insert query";
sqlcommand.parameter.Add(new sqlparameter("@cmdname","someValue"));
sqlcommand.ExecuteNonquery();
how to write the above code in better and safe way, i am expecting .net master also answer this question
put his view(pros and cons)
How would I convert an empty textbox.text to null when updating/inserting using an SqlCommand? I've got this to populate the textbox:
If IsDBNull(dr("data")) Then
TextBox1.Text = ""
Else
TextBox1.Text = dr("data")
End If
Here's the SET of the SqlCommand:
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I am accepting query/queries from user (our support team) in a text box where user can enter only one query or multiple queries. I need to display result of all queries entered in the textbox. If it is SELECT statement then result of that statement in grid which is done. If UPDATE/INSERT/DELETE then total number of rows affected which is also done but if only one UPDATE/INSERT/DELETE statement is entered in the textbox.
If user enters 2 UPDATE statements and then a SELECT statement then how can I get number of rows affected for individual UPDATE statements just like SQL Server Qury Analyzer displays messages in its result pane.
e.g.
(6 row(s) affected) -- first UPDATE statement
(4 row(s) affected) -- second UPDATE statement
(16 row(s) affected) -- for SELECT statement (grid will also be displayed along with these messages).
I tried almost everything, SqlDataSource (returns count of first statement only), SqlCommand.ExecuteNonQuery and DataAdapter.Fill (returns count of last statement only).
I have a problem with my SQL statement with the WHERE statement and I also need to return the declared variable. and I have a function which also needs to return the returned value but it's not passed in as parameter it passed back with a variable declared in the sql statement using the Return keyword I can't use OUPUT for declared variables so if there here's my code.
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'i'm working with visual studio 2005 asp.net c#. and i want to bind my website to my database with the "sqlConnection"
how do i get and set details from the database to the website fields with the sqlCommend and ect...
I wan to retrieve spesific data from northwind and list in my compare page.
in the first page i used gridview with checkboxes. all selected values get with session and then
send to my second page. I can display this values in the page but how can i retrieve all product details from my northwind db i dont know.
here is my second page code behind.
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and aspx page
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Can we declare a static method inside the Interface?If not means Why?
View 4 RepliesAt a bit of a loss here. As the subject says, I have a repeater control that uses the variable xmlN which is declared in my Sub Page_Load. Posted code below.
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ASCX File:
<asp:datagrid runat="server" id="gridFormFields" datakeyfield="FieldID"
autogeneratecolumns="False"
onitemcommand="gridFormFields_ItemCommand" onitemdatabound="gridFormFields_ItemDataBound">
<columns>
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In the code behind, the Control returned by FindControl is null. Why? How can I access the buttonMoveUpFormField and buttonMoveDownFormField controls? From the code behind, is it possible to access controls which are declared in the ItemTemplate section of the TemplateColumn section of a DataGrid?
inside procedure, how to know a sql returned records or not?
View 7 Replies i would like to know if there's something wrong in this asp.net code:
mydatareader = mycmd.executeReader()
if myDataReader.HasRow then
// Do something
end if
myConnection.Close()
If i avoid to call a "MyDataReader.Close()" does the connection close anyway ? I ask this because i'm assuming that if call a "MyConn.Close" it automatically close the associated datareader... or am i wrong ?