I have been able to successfully read a row of data from an SQL table using two column parameters. Now I would like to update this row with new information. Is this possible since the reader does not specify which row was read with the 'reader.Read();' command?
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Environment is : vwd2008, asp.net 3.5, linq to sql object model, formview, stored procedure used for query.On going problem... I have a simplified page with a webform content area from a master page. The content area contains a FormView connected to an object data source thru the design view tag. The O/R designer has the Lease Table and the stored procedure in the method area.
The stored procedure selects all records from a single table. I an using the DatabaseDataContext and selecting stored procedure name which has "return SingleResult".. There is no code written; the design view was used to create everything. The stored procedure executes in VWD 2008 express tab and shows desired records. I would like to use the O/R and Linq to SQL, and objectdatasource BUT.
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 have some code in my vb.net code behind that queries a database, and if there is data, outputs it from the codebehind to a datalist on my asp.net page. In addition to sending the data to the datalist on the page, I need to take the value from "mbillaty" that is returned from the sql query, and have that value be the selected value for a drop down box also on the page. I can get either the datalist to fill, or the selected value for the dropdown box to be selected depending upon which bit of code I place before the other (ARGH), but I can't get them to both work together on the page. What am I doing wrong?
[Code]....
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?
Here is the sqldatasource config code: <asp:SqlDataSource ID="SqlDataSource1" runat="server"
View 1 Replieshow can i select a record from A table and insert into B table using linq?
View 2 Replieshow to read last 20 record form a table for example (tb1) and the table consist of 3 column
View 4 RepliesI have a table that contain 1000 record and a webpage that contain 10 label to show the data in table and tow linkbutton for showing (next-previous) records. I want a query when i click on next show next 10 record and when i click on previous show previous 10 record (code in c# if possible)
View 3 Replieshow to use update using ADO.NET dataadapters.
View 2 RepliesI am not sure if I am in the right spot here because this really doesn't have to do any datacontrol but hopefully somone can give me a hand with this.
Basically I have a bunch of TextBox controls on a page that are displaying the data I want but when I try to run an UPDATE query on the record I get nothing. The record values don't update and I don't appear to get any exceptions.....I am actually kinda really baffled on this one, here is what I have for the update code: [Code]....
Btw, if there is an easier way to do this with a control I am up for suggestions as I am just going off of some of my old VB6 ways
i need to start reading a recordset starting from a specific record using SQL. For example: i've 10 records in my msaccess table and i'd like starting read it from record number 6 till the EOF.
View 4 RepliesI have website database with a data table constently being "insert, select, count". This table has over a million record and is growing really fast.
Now I'm start worring about whether or not my sql server could handle the pressure. or maybe to have a million record is not a good practice at all.
The specs of my server is almost the best in the market. So I won't worry about the hardware.
Just wondering if ended up 3 million record in that table, will my queries and sql server itself still running smoothly?
Is there a function that will search a record in a Sql Table, I'm using VB.Net.
View 3 RepliesI'm not sure if I'm using the correct SQL for what I need. Well, I know that I am not because I'm not getting the results that I expect.
I have a table of products and it has a productID field and a setID field.
Products can be grouped together by making the groupID the same for the both of them.
I have only @productID parameter. My goal is to get a list of products minus this product and any other product that it is grouped with (ie..setID is the same).
Here is the query that I wrote because it has worked when excluding products from another table. I used the explicit GUID and still nothing.
[Code]....
I used the barcode example to my application and it generated barcode perfectly now I want to know that can this barcode image is readable by a barcode reader device ?
If Yes then how and if no then why and how to do ?
I have to retreive all records from a table except 1 record. For example: I give example from default database in SQL ie "master" In "master" DB we have "spt_values" table. Now if I want to retreive all records from spt_values table except 1-1 record of type = A and type = B. To retreive all records its a simple query "Select * from spt_values where type in ('A','B')" -- this will returns 16 records. Now I want to retreive all record except 1-1 record left in each type, so it will return 14 records in result.
View 6 RepliesI want to retrieve the data from the last record of a table. For eg: I have sorted the data in my table and want the value from the last record? How can I do that?
Is there a way to check that "saving" data to a table was successful and then do something after that?
I would like to duplicate a table record but not all the columns.For example, Select from "TableA" Where recordid='1' AND insert into "TableA" All values except "col2" , "col3". I hope you got the idea. Could you please advise me what is the cleanest approach to get this done.
View 9 RepliesI want to get record count from below example.
I made two tables. One is club_info and another one is club_members.
And each table has data like following
[club_info]
club_id
club_name
:
[club_members]
mem_id
club_id
:
I want to get club_name and the member count for selected club_id and want to return the result as sqldatareader.
I have update statement.
UPDATE SPECT SET SRE = CLSS.NEWSID
FROM SPECT
INNER JOIN
student (NOLOCK) ON student.ID = SPECT.ID
INNER JOIN CLSS
ON CLSS.GID = SPECT.GID
ON CLSS.GID = student.GID
WHERE student.PID = '20201'
AND CLSS.PID = '20201'
AND SRE IS NOT NULL
However, student.PID and ClSS.PID need dynamically reach through from table CLSS to get each row of PID.
Here my table CLSS
[code]...
How to finish this one?
I would like to be able to read the first row of a table and then each successive row sequentially individually. So, is there a way to read the first row of a table, whatever the primary key may be, and then read the next sequential row in the table until the last row has been read? I need to be able to do this in order to create a list of column entries in each row for a listbox control that a user can select from.
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My question is how do i use SqlDataReader to read the last row added to a table getting the contents of a column and storing it as a c# varaible
I'm sure this has been answered many times already, but I still can't seem to find exactly how to search for this issue, so apologies in advance.
Anyway, I have a VB script for entering a row of data into a table by a web user. When this row of data is entered, I wish to take some of the values from the columns of the "primary" table, and have that data automatically create a new row of data in a "secondary" table. I think I'm part of the way there, here is my script:
[code]...
"ProductsByMfr" is the "primary" table - the table that the user adds data into when the button click event is fired.
"DealerPricing" is a "secondary" table that I wish to have some of the data from the newly-entered row in ProductsByMfr copied into. Am I even close here?
Is there a way I can automatically update a 'Date' column in my database table to the current date whenever any cell in that record is updated?I've started looking into table triggers a little bit and I'm wondering whether I can do it using this?
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