I have written a routine to delete a record from a table. I want to include a statement to 'close' the connection to the table but I do not know the syntex of the statement that will do this. My code is as follows:
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Is it possible to use LINQ to delete a row in a table within an SQL database? I am using an ADO connected command statement to delete a row where a string column equals a name. But, I would prefer to use an easier way with LINQ, if possible.
View 3 RepliesIt is possible to execute code behind in parent just after closing ModalPopupExtender ?
View 2 RepliesI am trying to delete record from table with proper mapping from linq to sql.There is an error stating that Rmove method not found and are u missing an assembly reference.
AdventureWorks db = new AdventureWorks("Integrated Security=sspi");
var query = from con in db.Contact
where con.LastName == "Klein"
select con;
foreach (Contact del in query)
{
db.Contact.Remove(del);//???Remove not working
}
db.SubmitChanges();
textBox1.Text = "Contact deleted.";
I have a question about linq delete.
I have 2 table in database and they are joined.
First Table: UserID, UserName, UserSurname, UserPhone, CompanyId
Second Table: CompanyId, CompanyName
First Table I have many recods with related second table.
I want to delete one company in second record, But firtly I have to delete users (more than 1)
How can I delete it with using linq?
how to Delete Child Record And Later Delete The Parent Record if it has no child
Trigger might be the answer but i don t know how!
when i want insert a record i see an error like this Can't perform Create, Update, or Delete operations on 'Table(MainMenuLink)' because it has no primary key. with this codes:
MyLinqDataClassesDataContext db = new MyLinqDataClassesDataContext();
MainMenuLink li = new MainMenuLink { Link = "www.tprogrammer.com", LinkSubject = "subject" };
db.MainMenuLinks.InsertOnSubmit(li); [code]....
I'm trying to make sure a block of code behind properly closes a connection to SQL after it's finished. But when I add the line "cmd.Connection.Close();" Visual Studio underlines "cmd" in green and says "unreachable code detected" What does that mean and how do I correct it?
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I am using a AccessDatasource for getting values from a accessdatabase for a Dropdown list. After i load the page and close it, a .ldb file is created. After wards i am not able to open the database manually. How to close the connection. I have given Network service Modify access [URL] to share permission, still no go.
View 3 RepliesThis morning I found myself dealing with A SQL POOLING ERROR Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached. I did fix this with resetting my pooling and setting a pooling max =100 Anyway now Im starting to rethink how I open connections, dealing with errors and proper closing of connections Would you say this code below is a good way of opening, closing connections (even when errors occurred)
Dim Connection As SqlConnection
Dim myConn As String = (ConfigurationManager.ConnectionStrings("MyConnString").ConnectionString)
Connection = New SqlConnection(myConn)
Try
Dim DBCommand As SqlCommand
Dim dt As New DataTable()
Dim myDataSet As New DataSet
Connection.Open()
DBCommand = New SqlCommand("GetAllCategories_", Connection)
DBCommand.CommandType = CommandType.StoredProcedure
DBCommand.Parameters.Add("@HomePageID", SqlDbType.Int).Value = HiddenChosenVirtualMainID.Value
Dim mySqlAdapter As New SqlDataAdapter(DBCommand)
mySqlAdapter.Fill(dt)
SecondLevelChildDatalist.DataSource = dt
SecondLevelChildDatalist.DataBind()
Catch ex As Exception
'Error goes here
SqlConnection.ClearAllPools()
Finally
'close the connction
Connection.Close()
Connection.Dispose()
End Try
I have a gridview with edit and delete parameters enabled. When I click on the edit link, I can edit the record successfully. However when I click on the delete link, nothing happens (the record does not get deleted).
View 5 RepliesI created a ListView and attempted to delete a record using the delete button and native procedures. It failed and threw an error.Pass in a valid dictionary for delete or change your mode to OverwriteChangesIn researching this issue, it appeared there is a problem with the list view when deleteing and
ConflictDetection is set to
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I am developing logging application with asp.net & vb.net & OracleAt present I'm using this mechanism to write logs
Method1 Connect (
Try{
Conn.open ()
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I am using a adapted version ofhttp://www.mikesdotnetting.com/Article/45/Programmatically-accessing-data-from-DataSource-controlsDon't we need something like a closing-routine / close connection command after getting data from the database?If yes: What is the correct closing command?
View 2 RepliesI was wondering about something. I'm supporting a .NET C# application which has a number of database connections declared locally as IDbConnection with MS SQL Server and NHibernate. These connections are declared locally and not explicitly closed after a specific operation is performed. Are these connections automatically closed after the local method is executed, or could these connections be floating around somewhere? We're having semaphore max out problems, and I'm trying to see if this may be the culprit. I'm doubtful, as I believe these connections would automatically close, but thought I'd throw out hte possibility.
View 1 Repliesi have a web application that use a MySql DataBase. In a page, i have used the sqlDatasource control. The problem is that the conection with the database doesn't closed and i have a lot of open conections until show me the error that says me that the conection pool is full.
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I am having problem in diffrentitate error between internet connection loss error and Other Error in query for example: duplicate record found.
Both the error fall into System.Data.SqlClient.SqlException category.
But the way to handle both this 2 error is different.For connection error , i need to bring user to connection loss page while for duplicate record found error, i need to show the user a pop up.
Unless i do a checking exactly on the error message , else i have no ways to differentiate connection loss error and any other error. Am i correct for this?
I would like to execute a stored proc that simply updates a record. At this point I would like to keep it parameter less. But in future, I will be adding parameters to the stored proc. Can I simply do it via SQLDataSource? It will save me writing few lines of code to execute stored proc in a traditional ado.net.
View 1 Repliesif I am running a detailsView_Deleting code and a condition is not met and I want to Cancel the delete, how do I code it?
View 4 RepliesI have a WCF service that processes some input arguments and retuns result in approximately 4 minutes. Sometimes the calling client may get request time out before the WCF service answers.
Now, my customer is asking me to stop processing on the service side when the client got timed out. Since, I could not know the status of cleint on the service, I could not stop the process.
I am counting from a table for that i have written code as below
protected void get_Id_Afterpoint()
{
int counter = 0;
string strSql = "select count(*) as ID from tblEnergy where ID=?";
OdbcCommand com = new OdbcCommand(strSql, con);
com.Parameters.AddWithValue("ID", DropDownList1.SelectedValue);
OdbcDataAdapter oda = new OdbcDataAdapter(com);
DataTable dt = new DataTable();
oda.Fill(dt);
if (dt.Rows.Count == 0)
{
lblID2.Text = "1";
}
else
{
counter = dt.Rows.Count;
counter = counter + 1;
lblID2.Text = Convert.ToString(counter);
}
}
there is no record related to DropDownList1.SelectedValue. but as i am counting if(dt.rows.count) and i put break point on the bolded part it shows 1 record. how it can be possible?
I have an error when playing with a table saying:
"text is not allowed between starting and closing tags of an element table"
Table is like this....
<table id="Content2" class="createAccountTable" cellpadding="0" cellspacing="0" style="width: 240px;">
<tr>
<td colspan="2" align="left" valign="top" class="topicStyle">
<h3>Order Summary</h3>
</td>
</tr>
<tr align ="center">......
I'm getting the error "Cannot Find Table 0" when executing an INSERT INTO sql statement. The fishy part is that the code half works -- the new information is submitted to the database. Here the code in question:
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how can i select a record from A table and insert into B table using linq?
View 2 RepliesI have a list of documents and different actions performed for each records. To delete the record i need the id to pass to the controller. I use JQuery to perform deletion. In it I need to Id of the record. The Following is my view:
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$.post("/BuildDocument/DeleteBuildDocument", {need to pass id here..}); need the id(BldDocId). How can i get it?