I'm trying to develop a VB.NET (2005) form with just a ComBobox and a TextBox.
I bind a combobox with the SqlCeResultset (Scrollable | Updatable ). Do the same with the TextBox.
Combobox1.DataSource = rsResultSet
TextBox1.DataBindings.Add("Text", rsResultSet, "Obs")
This works (when I change the Combo item the textbox changes as well) but any changes to the textbox text do not reach the DB.If i change the Combobox item and back the old data is still there. If i look at the result
set it does appear as updateable.
How can I update the SqlCeResultset when I change the TextBox text?
Hi, I wants to bind textbox with sqldatasource in c#.net so I am using following code and has following error... Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 22: Line 23: System.Data.DataView dv = (DataView) SqlDataSource1.Select(System.Web.UI.DataSourceSelectArguments.Empty);Line 24: TextBox1.Text = dv[0]["Proid"].ToString();Line 25: Line 26: }Please, anybody knows solution tell me
I have a SQL database with 1 column in it.. it is a do not call registry for my office. I want to make a web application so our leads can go on the web and request to be put on the do not call list. problem is, if their number already exists, it gets a violation of primary key... Normal handling for this would be to do a select query based on user input, and if it exists in the database, tell them that, else do the insert query... Problem is, i cant seem to figure out how to bind the result of the select query to a textbox or label so i can compare the results to do that logic. Any ideas? This is in asp .net 2.0. Thanks! -Dan
Hi, I have an updateable sqlceresultset, which i use to bind to a datagrid. The user can modify values in the grid. I wish to update these values in the database only when the user has finished making these changes and clicks "Accept" button. But with the sqlceresultset, it looks like with every modification in the grid, the resultset is updated and change is written to the sdf database file . Please suggest how to work around this.
I have created my connection correctly if (_deviceConn.State == ConnectionState.Closed) _deviceConn.Open();
_deviceCMD = new SqlCeCommand("UPDATE metar SET observation='"+ Value1 +"',lastupdate='"+ Value2 +"',Valid_Time='"+ Value3+"' WHERE aerodrome_oaci_code='"+ FilterValue +"'", _deviceConn);
int RecordsAffected = _deviceCMD.ExecuteNonQuery();
The code executes fine, in fact the recordsaffected returns 1, but Nothing happend on database side. Another thing is, when i run the project on release mode, a copy of the SDF file is there, so, which of the sdf files the project is actually updating?, cause im querying both (the one in my project source path and the one copied to release folder) and both have the same data witout any modification.
My Copy to output directory setting is = Copy if newer.
If i try this with query analizer works just fine.
could someone help me please.. urgent.. i'm using sql sever and microsoft visial basics.. need help!! in the database... id qty percent 'percent is numeric with 2 decimals1 10 ____ textbox1.text = "52.3" i want to place the value from the textbox into the database..how to update the database?
This program gets the values of A and B passed in. They are for table columns DXID and CODE. The textbox GET1 is initialized to B when the page is loaded. When I type another value in GET1 and try to save it, the original initialized value gets saved and not the new value I just typed in. A literal value, like "222" saves but the new GET1.TEXT doesn't.
I am using SqlCeResult and i want to give paging on that and read in help that you can do paging on ResultSet so . I need code example so that i can understand how to implement this in resultSet.
I have a table with an identity column. This is set to increase by 1 and start on 1, and is the first column of the table. When I insert a record into the resultset, I get an error stating that it can't be DbNull. Th record is created from a resultset with the query "Select * from table", so the id should be included
But as I understand it, it should be increasing automatically, right? Becuase that's the behaviour of the normal sql Insert command. I have seen an article that just left the id column in the record alone before inserting it, but it didn't help me. How can I sidestep this issue?
I am currently working with typed sqlceresultsets. I noticed that each resultset manages its own databaseconnection. I am considering to change this to a situation where I can reuse a databaseconnection on more than one sqlresultset. Will this result in better performance? for example, when I have 2 updates for wicht I need 2 resultsets, wouldn't it be better to use 1 connection and transaction instead of each resultset creating/disposing its own? I would realy like to hear some oppinions. thanks!
Hi I have written an Windows Mobile Application that insert 1000 records on SQL Compact 3.1 but I am having performance issues. If I use SqlCeResultSet and SqlCeUpdatableRecord in C# tha insert take 7 seconds to complete. But if I write a C++ application that uses OLEDB it takes only 4 seconds.
How can I improve the performance of the C# application? Also I would like to know if there is any possibility to use the same OLEDB objects that I use in C++ in a C# application.
I've noticed that after the first record from a ResultSet is deleted, HasRows property throws an exception like "The current row was deleted." Method ReadFirst() throws similar exception as well.
More details:
1. Create a ResultSet: ExecuteResultSet(ResultSetOptions.Updatable | ResultSetOptions.Scrollable | ResultSetOptions.Sensitive)
2. Let's say, there is no records in the resultset. Insert two new ones. Then call: ReadAbsolute(0); Delete(); HasRows; and the exception is thrown.
3. Then you can call ReadFirst() or Read with the same result.
4. Now call ReadAbsolute(0). It returns true. Call HasRows, ReadFirst() or Read() and you will get the exception each time.
I tried to explain this with the fact that Delete() doesn't change the current position of the ResultSet. But I don't see why that would mess the HasRows property or why after ReadAbsolute(0) retuns true, HasRows or ReadFirst() doesn't work.
I am trying to develope a Pocket PC application using MS Visual Studio 2005 (C#)and the database is in the device (.sdf file).
Am trying to retreive a single row from a table containing around 10000 rows. I would like to know the fastest method to retreive the values.
whether it is faster to use an SQLDataAdapter to retreive the values to a dataset or datatable OR retreive the values to a SQLCEResultSet OR is there any other faster retreival method.
I've noticed that after the first record from a ResultSet is deleted, HasRows property throws an exception like "The current row was deleted." Method ReadFirst() throws similar exception as well.
More details:
1. Create a ResultSet: ExecuteResultSet(ResultSetOptions.Updatable | ResultSetOptions.Scrollable | ResultSetOptions.Sensitive)
2. Let's say, there is no records in the resultset. Insert two new ones. Then call: ReadAbsolute(0); Delete(); HasRows; and the exception is thrown.
3. Then you can call ReadFirst() or Read with the same result.
4. Now call ReadAbsolute(0). It returns true. Call HasRows, ReadFirst() or Read() and you will get the exception each time.
I tried to explain this with the fact that Delete() doesn't change the current position of the ResultSet. But I don't see why that would mess the HasRows property or why after ReadAbsolute(0) retuns true, HasRows or ReadFirst() doesn't work.
ResultSetProductos = ComandoCargaProductos.ExecuteResultSet(Data.SqlServerCe.ResultSetOptions.Scrollable Or Data.SqlServerCe.ResultSetOptions.Updatable)
End Sub
And I want to obtain the schema of the table which my resultset is pointing
Dim tabla As Data.DataTable
tabla = Me.ResultSetProductos.GetSchemaTable
But the datatable that i obtain donīt seem to have the schema that i need, for example donīt have the primary keys i have define and also donīt have any constrains......
queryText = SELECT agvb_id as ID ,agvb_cat_id as Category ,agv_brn_id as Brand ,agvb_brn_name as BrandName ,agv_brn_area as Area ,agv_brn_sku_qty as SkuQuantity ,agv_brn_qty as Quantity ,agv_orderliness as Orderliness ,agvb_importance as Importance FROM AGENTS_VISITS_BRANDS WHERE (AGENTS_VISITS_BRANDS.agvb_agv_id = @agv_id) AND (AGENTS_VISITS_BRANDS.agvb_cat_id = @dad_id) ORDER BY agvb_brn_name
if i open resultSet with such qury it looses its updatable option.
If i remove from where 1 param (no mater which) everything runs ok.
Inside a single transaction I'm inserting/updating multiple records into multiple tables, in this order: table 1 record 1 table 2 record 1 table 3 record 1 table 1 record 2 table 2 record 1 table 1 record 3 table 2 record 3 table 3 record 3
Now I'm getting an unspecified error on a certain table:
Indicates a data modification, such as an insert, an update, or a deletion. Ensures that multiple updates cannot be made to the same resource at the same time. (I assume that multiple updates within the SAME transaction can be made, only multiple updates from different transaction cannot be made, right?) I cannot find any reference to this error message and don't know what the numbers mean. Maybe it relates to data that can be found in the sys.lock_information table like explained here, http://technet.microsoft.com/en-us/library/ms172932.aspx, but I'm not sure.
Furthermore, the sys.lock_information table is empty. I haven't been able to reproduce the problem myself. I only received an error log and the database to investigate it.
So, does anybody have an idea what this error message means and what I can do to troubleshoot this?
I have an updateable and sensitive SqlCeResultSet that is bound to a DataGrid via a BindingSource. All updates to the resultset are programmatic. Changes to an existing record in the resultset are visible in the DataGrid and I am getting corresponding ListChanged events fired from the BindingSource. When I perform an database update independent of the resultset that changes resultset membership, I can peform a ReadLast and see the additional records; however the ListChanged event does not fire. Also, when I explicitly "create" a new record in the resultset I do not get a ListChanged event and in both cases the DataGrid does not display the records. Re-binding to the existing resultset does not appear to work either. Only when I create a new resultset and bind do the new or records display. Using Compact Framework 2.0.
Hi! I dont know if i will explain this correctly, but my problem is with reporting service. I'm supposed to Sum value in one textbox and than that sum use it in sum in other textbox.
Something like this: Sum(Fields!Abc.Value/(Fields!dfg.Value+Sum(Fields!abc.Value)),"matrix1_RowGroup1")*100 I get error msg 'The Value expression for the textbox 'textbox49' contains an aggregate function (or RunningValue or RowNumber functions) in the argument to another aggregate function (or RunningValue). Aggregate functions cannot be nested inside other aggregate functions.'
Something like this wont work either Sum(Fields!abc.Value/ReportItems("textbox56").Value)*100 Error The Value expression for the textbox 'textbox55' uses an aggregate function on a report item. Aggregate functions can be used only on report items contained in page headers and footers.
So, pls help if you know how to reference textbox in other in body of report. Thx.
Hi all I have a form view which uses a SQL data source control to retrieve it's data from the sql express database the form view is used for view,edit,delete and insert data into the database in the insert mode I have two dropdownlists, where the second one is depending on the first one to retrieve the correct data from the data base BUT when selecting a value in the first dropdownlist it give me the following erro: Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.
Please How can do this any help is appriciated bye
Hey guys, Am in need of help please, basically the program im working with at the moment is when you add a New Contract, it will grab the Contract Number you have entered, Post it over to another page, then using that number bind a Gridview. The SQL being "SELECT Contract_ID, Contract_Number, Start_Date, End_Date, Quarterly_Rent FROM ECS_Contracts_Test WHERE Contract_Number = " & conNoVar (this being the Contract Number of the recently added Contract), however then it comes to Bind the Grid it kicks up an System.Data.SqlClient.SqlException: Syntax error converting the nvarchar value '2009P7899' to a column of data type int.But the Column Contract_Number is set to Varchar and all I really want to do is to create this gridview using this criteria and not convert anything! The Contract_ID is an int, which is needed as I increment it. Heres the error code: Public Sub BindtheGrid()'Bind the Contract Grid, where ContractID is used Dim SQL As String = "Contract_ID, Contract_Number, Start_Date, End_Date, Quarterly_Rent" Dim objConn As SqlConnection = New SqlConnection(ConnectionString) Dim cmdstock As SqlCommand = New SqlCommand("SELECT " & SQL & " FROM ECS_Contracts_Test WHERE Contract_Number = " & contractQueryID, objConn) cmdstock.CommandType = CommandType.Text objConn.Open() GridView1.DataSource = cmdstock.ExecuteReader() GridView1.DataBind() objConn.Close() End Sub If you need any more information then please let me know. Mucho Aprreciated
Hi guys, I am about to bind my websites user inputted values into my database. I intend to use sql for this. THe site is very basic, dropdownlists and textboxes. The user is required to choose values and write in questions. Now these inputs ought to be stored somewhere right??, so for that i am using sql. Now i know sql, but how do I store data from a website and all, I have no clue, someone give me basic steps on how to go about doing this pleaseeeeee!!!
I have this stored procedure that almost works: set ANSI_NULLS ON set QUOTED_IDENTIFIER ON go
ALTER PROCEDURE [dbo].[udForumTopicMessageByForumTopicID] @ForumTopicID int AS SELECT ftm_parent.ForumTopicMessageID AS "ForumTopicMessageID", ftm_parent.ForumTopicID AS "ForumTopicID", ftm_parent.ContactID AS "ContactID", ftm_parent.MessageTitle AS "MessageTitle", ftm_parent.MessageText AS "MessageText", ftm_parent.ApprovedInd AS "Approved", ftm_parent.ReviewedInd AS "ReviewedInd", ftm_parent.ParentMessageID AS "ParentMessageID", ftm_parent.OwnerCompany AS "ForumTopicMessageOwnerCompany", ftm_parent.CreateUser AS "ForumTopicMessageCreateUser", ftm_parent.UpdateUser AS "ForumTopicMessageUpdateUser", ftm_parent.CreateDate AS "ForumTopicMessageCreateDate", ftm_parent.UpdateDate AS "ForumTopicMessageUpdateDate", '('+CAST(ChildResponseCount As VARCHAR(10))+')' As "ChildResponseCount", (T_Contact.Lastname + ', ' + T_Contact.Firstname) As "ContactName" FROM [T_ForumTopicMessage] as ftm_parent INNER JOIN [T_Contact] ON [T_Contact].ContactID = ftm_parent.ContactID Left JOIN (Select COUNT([T_ForumTopicMessage].ForumTopicMessageID) As "ChildResponseCount", MAX([T_ForumTopicMessage].ParentMessageID) AS "ParentMessageID" FROM [T_ForumTopicMessage] WHERE [T_ForumTopicMessage].ParentMessageID = ftm_parent.ForumTopicMessageID group by [T_ForumTopicMessage].ForumTopicMessageID) as ftm_child ON ftm_parent.ForumTopicMessageID = ftm_child.ParentMessageID WHERE ftm_parent.ForumTopicID = @ForumTopicID ORDER BY ftm_parent.CreateDate See the purple ftm_parent.ForumtopicMessageID. If I hard-code that to a 2, this works. With the fieldname there, SQL Server Management Studio says: Msg 4104, Level 16, State 1, Procedure udForumTopicMessageByForumTopicID, Line 9 The multi-part identifier "ftm_parent.ForumTopicMessageID" could not be bound. If any experts out there can help me out with this, I'm sure it wouldn't take much to fix.
i want to count the number of times a particular data occurs in a table and display that data in a listbox
initially i planned to count the number of occurrences and bind that number to a variable for further manipulation but i have no idea how to do the binding part
I am new to .net and I am using Visual Web Developer 2005 Express with SQL Server 2005 Express. What I would like to do is connect to my SQL database (which resides in the app_data folder) and open a table and pull out a field and place it in either a textbox or label on the page. No editing or deleting. Just simple one field binding. By the way, I can do this with all the cool built-in tools of VWD, but I want to know how to do it all by hand. I would really appreciate it if someone could help me out.
I have search for answers to the all over google and every thing I have found so far did not work for some reason or anothr. . Here is what I am looking for I am codeing in Visual Studio using C#. I have been able to crate a connection and create taxt boxes with a submit button that when it is presed enters data in to a database (Sql server) what I have been unable to do is: 1. Display data in a text box. 2. Update data 3. create buttons to navagate through fields. I know I can do this with the gridview or datagrid but in really need a custome form for what I am doing.
