Is it possible to perform an update command which performs addition using a value from a textbox? For example: User inputs a number into TextBox1 (I use regular expression validation to ensure this is an integer).
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Basically if the user inputs 5 into TextBox1, I want the update command to subtract 5 from that user's ballance.
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 ="../error/error.aspx", LinkSubject = "subject" };
db.MainMenuLinks.InsertOnSubmit(li);
db.SubmitChanges();
ShowLinks();
what is the problem?
my table have a primary key but i dont know why give an error!!!
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]....
how would i do my Gridview delete command like a update command?
im using a datasource... and my delete command is like my update command... so i can change the status into "INACTIVE"...
DeleteCommand="UPDATE ACCOUNT_MAINTENANCE SET am_status = 'INACTIVE' WHERE (accmain_no = @accmain_no)"
UpdateCommand="UPDATE [ACCOUNT_MAINTENANCE] SET [account_type] = UPPER(@account_type), [min_deposit] = @min_deposit, [min_capital] = @min_capital WHERE [accmain_no] = @accmain_no"
when i press my delete command at gridview... the status changed into "INACTIVE" but when i refresh or press f5... it automatically update the status into "INACTIVE" also...
given below is the simple update string am using to update my database...
string q = "update register set fname='" + TextBox1.Text +
"',lname='" + TextBox2.Text +
"',gender='" + gender +
"',edu='" + TextBox3.Text +
"' where username='"+check +"'";
cmd.ExecuteNonQuery();
SqlCommand cmd =
new
SqlCommand(q, cn);
but it is not working...database is not getting updated...why?
I have the below code in my project..however its giving me an error on the update(bolded line)..please help me on this..
Private Sub ChangePassword1_ChangedPassword(ByVal sender As Object, ByVal e As System.EventArgs) Handles ChangePassword1.ChangedPassword
lblTempPassword.Text = ChangePassword1.NewPassword.ToString
CustomerName.Text = CType(Session("UserName"), String)
Dim FV1Updobjconn As Data.SqlClient.SqlConnection
FV1Updobjconn = New Data.SqlClient.SqlConnection()
FV1Updobjconn.ConnectionString = ConfigurationManager.ConnectionStrings("ASPNETDBconnectionString1").ConnectionString
FV1Updobjconn.Open()
Dim dtUpdating As New Data.DataTable()
Dim sqlUpdating As String = "UPDATE [SuperAdmin] SET [TempPasswd]= @SU2TempPasswd, [TempPwd]=@CU2TempPwd WHERE ([CustomerName] = [@CU2CustomerName])"
Dim cmdUpdating As New Data.SqlClient.SqlCommand(sqlUpdating, FV1Updobjconn)
cmdUpdating.Parameters.AddWithValue("@SU2UserId", UserIDValue.Text)
cmdUpdating.Parameters.AddWithValue("@SU2TempPasswd", lblTempPassword.Text)
cmdUpdating.Parameters.AddWithValue("@CU2TempPwd", False)
cmdUpdating.ExecuteNonQuery().... I get an error here saying..INVALID COLUMN "CU2CustomerName"
' Dim adUpdating As New Data.SqlClient.SqlDataAdapter(cmdUpdating)
' adUpdating.Fill(dtUpdating)
' Get the values needed to be passed on
' CtSUCompanyName.Text = dtUpdating.Rows(0)("CompanyName").ToString()
' CtSUCatPurch.Text = dtUpdating.Rows(0)("CategoriesPurchases").ToString()
FV1Updobjconn.Close()
End Sub
I have a detailsview which I am populating using a SQLDATASOURCE, which is bound to a table in a SQL db. Because the number of columns in the table will change, I am using SELECT * from [TABLENAME] to populate the view, this works fine.
My problem is that I need to also be able to update the table and I thought the best way was to generate the updatecommand in the code behind. This is no problem, code is as follows:
[Code]....
But the next stage is to create the relevant parameters for the update command. Does anybody have any thoughts on this? All of the information I have found for the updateParamater reference knowing the final value.
What I really need to do is the code behind equivalent of
<asp:Parameter Name="PARAMETERNAME" Type="Int32" />
Not sure whether this is possible.
we have a AutoGenerateColumns-enabled WmxDataGrid in which we are able to update table rows in a DataBase connected with a SqlDataSource.
Each time we clear a field an empty string is written to the database where we want to write DBNull values.
At the moment we generate the update string via UPDATE... SET.. and the SQL Server function NULLIF(value, '').
Works proper but when I want to add the values to e.NewValues in BeginUpdate event I'm not able to read the values from the auto generated text boxes. How do I do that? Is there an easier way to automatically convert empty strings to NULL values?
I got a gridview to display the data from the database properly but when I go edit. it give me an error. I searched and change ConflictDetection=CompareAllValues to OverwriteChanges
The error goes away. However the database is still doesn't update. Does anyone had to tweak the gridview function to make it works. Maybe I did something wrong.
I want to issue an INSERT command for an SQL Server table using DataAdapter without first issuing a SELECT command. Could anybody send me lines of code to handle this? Also how do i manage INSERT into selective table columns (I have 10 columns but i only want to update 2 of them)?
View 2 RepliesHow to ? Perform the search function in gridview ...
View 1 RepliesHow to perform the search function for whole website in asp.net ....
View 1 RepliesThere are 5-6 insert, select queries at my project. All queries and program works fine at device simulator.In fact all queries also works at the device (intermec - windows mobile 6.1 classic) but "only one of the insert query" doesnt work (very simple one : insert into members values(a,b,c,d,e) like this.) at the device.
View 1 RepliesI find my own way redundant to perform an insert command in a master-detail transaction. Sample, is a Purchase Order, before inserting the details/items will need to find the master key otherwise were not able to make the details connection. Normally we send command to button object which will submit the whole page rather than part of it and these means were not able to capture beforehand the master key to refer in the details.
So, Im thinking of how you do efficiently a master/detail batch update like we normally do in windows apps.
I'm trying to calculate a customer tax.
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I really nead any appropriate function to fix it.
I have a gridview with checkboxlist for each record. I was updating each record individually based on that check, but now they want it to be a bulk update instead of individual. So i have commented out my individual update and added a button below the gridview and created my button event, how to loop thru the gridview and find the checked records and call my update procedure.
i found something kinda close to what i need, but its in VB and not sure how to convert that to C#
[URL]
if it's possible to use the Gridview (SQLDatasource) UpdateCommand to actually perform an INSERT and not a true update.Here's the dealUsing a Select statement in my SQLDatasource,I'm retrieving records for which there are no History records for a specified period.(Essentially, I'm asking "Show me all records for which there are no historical records within a specified range").I'm using that result set to feed my GridView. Basically, I'm displaying all I need to know about the insert records sans one piece of info.When the user choose the "Edit" button, the row goes into edit mode.Using a template field, I've created a drop down box to allow the user to input the status of the data for that particular time period.When they click the save button,the idea is that the UpdateCommand will fire.However, when I click the save button (in edit mode),I get a postback error that tells me System.Data.SqlClient.SqlException: Must declare the scalar variable "@EQP_PK".
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I've recently started working in ASP.NET and RDBMS.I'm making a test form where I can do basic add,update,delete operations.I'm using OracleDataClient to do the DB operations.I was able to populate a listbox using OracleDataAdapter.
Now after clicking on update button,I intend to Update in DB.I've Dataadapter with it's update property.But the update query is not happening.The examples I saw over net all have Select command before Update.Is it actually like that or am I missing some point.
How does Oracle DataClient work with Insert,Update,Delete Commands.
how to perform Edit/Update & cancel in the grid view .. already the data is there in the gridview
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My web application calls a stored procedure and stores the result in a .NET datatable. I'd like to use this datatable and join it with other tables in my database. Is this possible?
Would the best way to set this up be to create another datatable and then use a dataview to join both datatables?
I get from SQL Server Server Data. I need to use datas form 2 colums of my SQL query for a VB.NET. The VB.NET need 2 values for both colums and produce 1 answer. I what to display the value on the same line instead of the 2 1st values. How can i store the 2 colums wich lot of SQL values on my vb.net script and diplay the result with the other data from the SQL query ?
View 3 RepliesI have the following query:
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The results look like this:
DocumentNumber NIIN QtyReq AvailBalance
12345 015551212 2 5
12346 015551212 1 5
12347 015551212 3 5
12348 015554787 10 12
As you can see, the first 3 documents are for the same NIIN, and their total QtyReq is 6, however there are only 5 Available for this NIIN.
I need a way to remove the document 12346 because it cannot be filled, the other 2 document can though. I cannot figure this one out, but it seems like it should be pretty easy.I am using MS SQL Server 200
Is there a way to select certain rows and for each row, perform a function? Specifically, I want to select specific rows and then send them an email.
Here's a breakdown:
1. Select * from STUDENTS where status = active
2. For each row that is returned, take the $email column and email the student message
3. Repeat until all qualifying rows have been completed.
Without giving away specifics: basically, I have a bunch of users adding content to my site. What happens now is ajax sends the text to a web service which does its thing, sends the info to the DB, Sends the user an e-mail, and then returns a response to the browser to do something.
What I would like to do is change that order. I want to return a response to the browser so the user is not waiting on the e-mail to send before they get their response. Basically, I'm trying to gain every milisecond I can to quicken the response, and there's no reason for the user to wait for the server to send their e-mail before it tells them that everything worked ok. If the info went to the DB, that's all the user needs to know, they'll know the e-mail sent when it shows up in their inbox. I notice this is an issue on my local machine which has no SMTP server and can actually hang the page response up for a few extra seconds because it's throwing errors trying to send something with no SMTP server.
So, I know in my function when I say
[Code]....
it WORKS, but I want to send the e-mail after the return. Is there ANY way to get this to happen?
(1) "...this application is a very heavy SQL application, it does not perform a session based SQL connection, instead for every request it refers back to the base confirmation file on the web server and then opening or making a new SQL request the result being a very chatty SQL client!"(2)..." concerns specifically relating to the chattiness of the SQL client app. Please be cautious when "testing" the product for it may have a negative effect even on [the] faster WAN links"C. Example of Code(1) from a class helper file:
"
public Product GetProductByName(string name)
{
[code]...