DataSource Controls :: InsertCommand Parameters For Filestream Data
Jun 4, 2010
I'm trying to define a sqldatasource for writing out SQL Filestream data. For example, I have a SQL table with a column named Data, which is FileStream. The column type is VarBinary(max)
InsertCommand = "INSERT INTO MYTABLE (Data) VALUES (@Data)"
<asp:Parameter Name="Data" Type = ???? What goes here????>
In the code-behind to load the data, I want something like,
e.Command.Parameters("@Data").Value = StringToByteArray("HERE'S THE CONTENTS OF MY FILE")
I have StringToByteArray defined as Encoding.Unicode.GetBytes(String.Empty+inputParameter)
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Jun 4, 2010
Is there anything special you have to do to retrieve Filestream data using a SqlDataSource? I'm using VB and have this as my sqldatasource:
<asp:SqlDataSource ID="SqlDataSourceReadPD" runat="server" etc...
SelectCommand="SELECT [PDIPAttachment] FROM [PositionDescriptions] WHERE ([CP_IDString] = @CP_IDString)">
<SelectParameters>
<asp:Parameter Name="CP_IDString" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
PDIPAttachment is a FILESTREAM column in my table called PositionDescriptions
and this is some of my VB cod:
Dim dv As DataView = DirectCast(SqlDataSourceReadPD.Select(DataSourceSelectArguments.Empty), DataView)
Dim dr As DataRowView
For Each dr In dv
Dim data as Byte() = System.Text.Encoding.ASCII.GetBytes(dr("PDIPAttachment").ToString())
Next
The Filestream data has a PDF file in it, but what I"m getting back in "data" are 13 bytes consisting of: "System.Byte[]".
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Nov 18, 2010
How do I make a Sqldatasource perform its InsertCommand with VB.NET? Normally, a control on the web page would call this command, but I want to use it in Code Behind.The full routine will be to check and see if the sqldatasource is NOT empty then run an UpdateCommand, but if is empty then run an InsertCommand.
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May 6, 2010
I have two pages for different companies with nearly the same ASPX markup and code-behinds (main alterations include certain fields from the same table being read-only in one and editable in another), #1 has a Select (for populating the DetailsView) and Update while #2 has Insert, Select and Update. #2's Insert and Update functions are not operating while #1's are just fine... I've gone through optimizing #2's codebase and I for the life of me cannot figure out why it's not functioning properly. What follows is #2's markup and codebehind for the relative functions accessed:
[Code]....
Here follows the code-behind:
[Code]....
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May 27, 2010
In of my application I am using the database to store and retrive images. The table stores the documents and the datatype of the field is IMage.
Now with Sql Server 2008, i would like to upgrade this to use this new feature. WHat changes do I have to make in terms of code and also in the database.
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Jan 25, 2010
I've got a vb.net page that when a user clicks a button in a gridview, it copys the file (row seleted) in the gridview as "Label2" from the webserver to the users pc. (We had to setup a lot of security to get it so the webserver could copy to the users pc). I have that all working fine, but now, I'm trying to see if FileStream will then open the file that was just downloaded on the users PC. I'm not familiar with FileStream, and could use a little push in the right direction. (Disclaimer, yes I know downloading the file directly to the pc is a crazy thing to do, but it's a really long story. :-)
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[Code]....
[Code]....
[Code]....
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May 28, 2010
I have a Gridview where I am presenting the data from a backend SQL DB. The values are populated into the Gridview without any problem and I am also able to Delete the rows and Update the info using the built in "Edit" Button, But when I try to insert some new value in a blank space nothing happens when I click on "Update" button. It just refreshes the page without any changes made. Below is my code for InsertCommand and also for DeleteCommand and UpdateCommand (which are working fine). There is also a column for "Record ID" which is the primary key in the table and is used in the Delete and Update command which is what I think is making these command work while it is not used (I don't know how to include it) in the Insert command.
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May 21, 2010
I want to use a button to fire up the SqlDataSource InsertCommand. how do I do that? do I have to use FormView with 'DefaultMode="Insert" ?
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Apr 23, 2010
I have an ObjectDataSource3 that I am trying to use to insert data from:
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From: Dropdownlist2.selected value To: (ProductCode)
From: txtTitle (Title) To: (Title)
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The btnAdd event is suppose to calls:
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Below is my code for both the page and class. Although my class is expecting parameters, I don't know how to get the parameters to the insert function in my class.
[Code]....
[Code]....
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Mar 24, 2010
I was looking at the options in Intellisense for the properties used with a parameter for the Object Data Source. There is one that I don't understand how it would be used. explain, or recommend an article, about the DB Type is for and how it would be used?
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Feb 12, 2010
I want to make data-driven page and ability to filter data on some parameters, for example 3 text boxes and 2 dropdown lists and then show the results by the grid view control.
Actually I like input data in the text boxes and select item from dropdown list and then press "OK" Button and result (filtered data) show in the new page by the grid view.
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Jun 16, 2010
I have a database containing a table with about 700,000 images so I recently enabled Filestream. However, I can't figure out how to render the images.
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Apr 20, 2010
I have an insert that uses an object data source with out the direction property set and it works fine. I noticed the direction property though and wondered if I should use it.Should the direction property for the parameters of an object data source be used with a simple CRUD operations?
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Jun 14, 2010
I have a SQL datasource, hooked to a gridview. When i submit my updated row, the update parameters fills with the original values, instead of the new values. Am i doing something wrong? I have tried to handle everything in the html, and not code any parameter settings. All my update parameters are called the same as the field in my gridview, and i use a prefix infront of the parameter names in my updatecommand, in my case : (instead of @) since i use oracle.
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Apr 19, 2010
I am building a WCF Web Service that has a Business Logic layer (that implements all validation logic and other business rules) and a Data Access Layer that makes calls to Stored Procedures in my database.
I would like to be able to validate the length of data passed against that of the length of the parameters in the Stored Procedures without having to explicitly define the parameter lengths in my WCF Web Service.
Eg:
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{
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Has anyone tried this out before? Is this even possible?
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Nov 10, 2010
[code]....
Is ther a way I can tie DataSource to SqlDataSource on aspx page and pass select parameters?
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Jan 21, 2010
here is my code for selectiong some records from db table
string strSql = "select * from mtblNBD where SentTo=@SentTo and InternalStatus Is NULL order by DeadLine desc";
SqlCommand com = new SqlCommand(strSql, con);
com.Parameters.Add("@SentTo", SqlDbType.NVarChar, 50).Value = (string)Session["uname"];
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Jun 22, 2010
I am trying to write a function that can be called to run a stored procedure. I pass the stored procedure name, followed by as many parameters as I need to run the procedure. I am able to do this by using the params keyword, so my function looks something like this;
[Code]....
How can I determine what the data type of the parameter is? Maybe I need to alter the string[] part, above?
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Mar 1, 2011
i have list view inside another list view like lv1-->lv2 now problem is inserting record in nested list view see error...
Inserting is not supported by data source 'SqlDataSource2' unless InsertCommand is specified.
another problem when i keep datasource2 in LV1 selected template but datasource2 is not binding lv2.. how can bind lv2...?
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Jun 23, 2010
How could I add parameters on dataadapter? I tried
[Code]....
But parameters is unknown for dataadapter.
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Sep 4, 2010
I have asked similiar question before where I have two control on the page header says "username" and "gender". User can select both the control or either one and the page will execute searching based on the criteria supplied. So if username supplied
SELECT * FROM [this_table] WHERE username = @username
and if gender supplied
SELECT * FROM [this_table] WHERE gender = @gender
and if both supplied
SELECT * FROM [this_table] WHERE username = @username AND gender = @gender
I know this sounds not very complicated but in my case, I am having like more than 10 controls up there. It is something likeusername, gender, age, date of brith, title, father name, frst name, last name, blur blur blur and it's a lot then I started to lost. if i were to use if else caluse on code-behind and produce query, it would end up writing a lot of if-else and if i use stored procedure (with if-else) then my stored procedure would contains a lot of if-else statement. I am fairly new to this concept and if I'm on the wrong track, please correct me. Is there any better way to save my hair without actually going through each
if-else statement to build the query ?p.s. I'm using GridView and SqlDataSource command to display the result back on .aspx page.
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Jun 4, 2010
I have webform with a listview control on it that uses 2 date values supplied by the user (via 2 text boxes) to dynamically set date range parameters for the datasource. The user enters two dates and clicks a button that runs the following code that sets the parameters:
[Code]....
This code works the first time the user clicks the button. But if they change the date values and try again, it only returns the result set from the first request. The parameters are not updated to the new values supplied by the user.
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Oct 4, 2010
I am trying to check whether a username exists in my database before inserting the new row & display a message to the user if it does.
On my SqlDataSource my InsertCommand looks like this:
InsertCommand="IF NOT EXISTS (SELECT * FROM Users WHERE UserName = @UserName) BEGIN INSERT [Users] ([UserName], [FirstName], [LastName], [City], [State], [Country], [CompanyName], [Active], [PasswordHash]) VALUES (@UserName, @FirstName, @LastName, @City,
@State, @Country, @CompanyName, @Active, @PasswordHash) END"
This works as expected: If the username is unique, the row is created.
If the username already exists, the row is not added.
The problem is, if the row already exists, the insert is rejected but the user is not notified.
So my question is, is there a way I can notify the user?
Maybe something like: InsertCommand = "If Not Exists (select....) Begin Insert...Else Notify User Somehow End This is a basic database, I'm not using the built-in membership provider nor will be.
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Jan 10, 2010
I'm linking a form to sql database, As far as i know for textbox the code will be like this one below in VB:
dashDataSource.InsertParameters.Add("databaseColumName", NameOFTextBox.Text)
But what is the code for a drop down menu for countries list?
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Apr 13, 2010
I can't see what I've missed
Dim strSQL As String = _
"UPDATE [emailText] SET " & _
"[stdSubjectLine] = @subjLine, [stdBodyText] = @bodyText, " & _
[code]...
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