DataSource Controls :: Access SelectParameters In Code?

Jan 10, 2011

I am building up asp:ControlParameters in my SqlDataSource at design time that all have ControlIDs based on textboxes and radiobuttons in my form, and those seem to work OK. Now, I want to build my SQL select query up in the PageLoad event and I can't seem to get the values of these SelectParameters. If at design time I create a ControlParameter like:

[Code]....

...why is it giving me an error saying "ERROR: Microsoft SQL Server: Must declare the variable '@cp_employee_last_name'"? That SQL Where clause should just be whatever the user typed into tbEmployeeLastName.Text, right?

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DataSource Controls :: Assigning Values To SelectParameters In Code?

May 6, 2010

I want to define SelectParameters for my SqlDataSource in markup and then assign values in code, but when I use the syntax:

[Code]....

It works the first time, but won't let me re-add the parameters on subsequent postbacks.

I can't use ControlParameters in this case because the values in the controls are loaded from xml files and some minor parsing needs to be done to the values before they're passed to the database.

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DataSource Controls :: Pass Selectparameters To A DAL Class?

Mar 16, 2011

I have a webform whose ObjectDataSource reads an xml file to populate a GridView in the .aspx page. I have to hard code the file path in the .cs file defining the ObjectDataSource classes. I want to be able to use a portion of the query string to indicate which file to select, but, normal methods, like Server.MapPath and Http.Request.Current don't work in the class page. how I can pass values from the SelectParameters configured in the ObjectDataSource down to the ObjectDataSource method? Here is my Class code:

[Code]....

The filePath variable is what I want to be able to alter based on my query string.

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DataSource Controls :: SelectParameterS Multiple Parameters?

Oct 4, 2010

I want to pass to a DataSource(SQL, Linq) more than one SelectParameter or what ever will do the work.I have many ArtistIds i want to pass to my source, so that it will display only those entries with my Parameters.My Problem is, that i dont know in which Format i can pass more than one Parameter, till now i used QueryStrings but that only works for one Parameter, no? I have a DataTable filled with all my IDs and im system-caching it to pass it from a Search-Site to a Detail-Site, maybe theres a better way?

This is my Source:

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
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DataSource Controls :: Passing Object To ObjectDataSource.SelectParameters Collection

Mar 30, 2010

I'm trying to use an ObjectDataSource's SelectMethod() to retrieve a result set from a sql server database to populate a data table with various stored procs that have any given number of parameters. My approach is to pass an object which contains the stored proc name and information about its parameters into the SelectMethod(). My issue is that I don't know how to actually set the default value. Here is the code I have so far:

ObjectDataSource1.DataObjectTypeName = "WebApplication1.Children";
ObjectDataSource1.TypeName = "WebApplication1.Children";
ObjectDataSource1.SelectMethod = "Select";

Parameter odsParameter = new Parameter() { Name = "storedProc", Type = TypeCode.Object };

// How do you set the default value to reference an object?

ObjectDataSource1.SelectParameters.Add(odsParameter);

namespace WebApplication1
{
public class Children
{
public DataTable Select(object storedProc)
{
// do stuff here and get db values.
}
}
}

The default value of a Parameter object is a string type. Does anyone know how to set the default value with an object or how I can pass an object into the SelectMethod?

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Access :: How To Convert The C# Code To Access Sql To C# Code To Access Microsoft Access

Aug 12, 2010

I have a code to link to sql can anyone give me the same code for microsoft access....

try
{
int videoID = Convert.ToInt32(Request.QueryString["ID"]);
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}
catch (Exception ex)
{
Label1.Text = Convert.ToString(ex);
}
finally
{
}

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Jun 17, 2010

I have a situation where I am accessing a database multiple times and I'm wondering if it is necessary.

I have a GridView with a template column with a hyperlink to "Get Results" and on the RowDataBound event I have it check the batch number against the database and see if results exist and then if they don't, hide the link.

So when viewing the page if there is 20 rows in the gridview it is effectively doing 20 queries.

I was wondering if it is a better idea to query the database once with all "batches" and load it into a datatable, then on the RowDataBound event query the datatable. The only issue I see with this is there is currently 40,000 batches and grows daily.

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DataSource Controls :: Access Property Of Object As Session Variable As Declarative Datasource Parameter Value

Oct 27, 2010

I am storing a custom "Organisation" object as a session variable. One of the properties of the Organisation object is "OrganisationID" (integer). I have a DataSource that requires a parameter value to run, and I want to use a SessionParameter to populate this. In a previous version, I stored the OrganisationID directly as a session variable. In that case, I could easily access it like this:

[Code]....

However, how do I now access the OrganisationID property of an "Organisation" type session variable (called "Organisation")? I have tried this, which does not seem to work: <asp:SessionParameter Name="OrganisationID" SessionField="Organisation.OrganisationID" Type="Int32" />

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DataSource Controls :: Can The Select Command Of A SqlDataSource Be Given By Code In The Code Behind File

Apr 16, 2010

Can the select command of a SqlDataSource be given by code in the code behind file. Also by calling the SqlDataSource.Select can the select statement be executed?

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DataSource Controls :: Binding An ObjectDataSource To A Property In Aspx Code, Not Code-behind

Dec 3, 2010

I want to bind an ObjectDataSource to a property in my asp page and I want to do it in the page's aspx code, not in code-behind. I've already done it in code-behind, as follows:

[Code]....

I'd prefer to get rid of the ugly code-behind and just do this in mark-up. Something like
[Code]....

This gives me a run-time error: Cannot create an object of type 'System.Object' from its string representation 'SelectedBook' for the 'DataSource' property.Is there a way of doing this declaratively and not in code-behind? Further, what if what I want is to actually use a child property of the property in question? For example, if my Book object has a ReaderComments collection, can I databind to it decaratively in the aspx mark-up?

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DataSource Controls :: Passing Parameter To Datasource In Code Behind?

Mar 25, 2010

I need to pass the control parameter to Sql Datasource in code behind,

<asp:ControlParameter ControlID="DDL_RType" Name="rtype" PropertyName="SelectedValue"

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But when I try to do the same on another page, I cannot access any control whether I drag a new control on the page or not.

It seems the code behind and the visual page aren't connected.

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Access Controls Inside FormView From Code Behind

Dec 18, 2010

I have a checkbox and a panel inside of a FormView control, and I need to access them from the code behind in order to use the checkbox to determine whether or not the panel is visible. This is the code that I originally used, but since I put the controls inside of the FormView, it no longer works.

Protected Sub checkGenEd_CheckedChanged(ByVal sender As Object, _
ByVal e As System.EventArgs)
If checkGenEd.Checked = True Then
panelOutcome.Visible = True
Else
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End If
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I've started to figure this out based on other questions I looked up on here, but all of them were in C# instead of VB, so this is as far as I got:

Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
End If
End Sub

So yeah I'm not sure exactly how to finish it. here's my code now:

Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
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End If
End Sub

It's also saying that checkGenEd and panelOutcome are not declared. I changed my code to this but it still doesn't work:

Protected Sub FormView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.DataBound
If FormView1.CurrentMode = FormViewMode.Edit Then
Dim checkGenEd As CheckBox = FormView1.FindControl("checkGenEd")
Dim panelOutcome As Panel = FormView1.FindControl("panelOutcome")
If checkGenEd.Checked = True Then
panelOutcome.Visible = True
Else
panelOutcome.Visible = False
End If
End If
End Sub

There aren't any errors anymore, but nothing happens when I click the checkbox. I think there needs to be some kind of event to trigger it but I don't know how you can put an event handler inside of an event handler.

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I have User.cs class which contains TxtLogin and StrLogin.

[Code]...

When I debug the program and enter correct username and password it should show me "Thank you" rather than it is showing me "Enter valid Username and Password".

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Jan 13, 2011

Is there any way to access code behind for controls in content pages??

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Mar 23, 2010

I am using the following code to insert data into an Access Database. Also this is the sqlcommand.

UPDATE TASKS Set Notes="bunch of html code" WHERE APPLICATION="SomeApp"

However I get an error. How can I input data regardless of what is in the command area?

'Dim ConnString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|AddCol.mdb"

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I have been asked to support a legacy app and I can't get access to the code behind files. I need to add a new feature that gets a list of items from the database on page_load, what way would adding an "in-page" page_load affect the compiled page_load?

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Forms Data Controls :: Access DIV Inside A Gridview From Code Behind

Jan 18, 2011

i have a div inside a gridview. Now I need to access the div from code behind to change its background color

for some specific data.

[Code]....

I am trying to access the DIV from gridview row data bound without any success.
[Code]....

I have the following error

"System.NullReferenceException: Object reference not set to an instance of an object."

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Forms Data Controls :: Access Datalist Control From Code Behind?

Jul 22, 2010

I want to access my checkbox in code behind. I have my checkbox in my aspx file like this:

[Code]....

And i'm trying to set the checkbox visible=false like this but it's not working. Error message: Object reference not set to an instance of an object.

[Code]....

This is just one thing i want to do with my controls in my datalist, so i don't want to in my aspx file like this:

<asp:CheckBox ID="CheckBox1" runat="server" Visible='<%# if(Eval("isFolder")="1","false","true") %>' />

Because i have quite a lot of things i would like to do in the code behind when i'm getting my files..

Is it possible somehow to achieve this without having to put servercode in my aspx file?

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DataSource Controls :: Cannot Access SQL Express Db From App

Feb 7, 2010

I have SQL Express loaded on a separate box. I have my ASP.NET loaded on my local machine. When I try to connect I get the following error:

{"Cannot open database "MyDB" requested by the login. The login failed. Login failed for user 'sa'."}

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Jun 16, 2010

My problem i am facing is that i do not know if it's possible to access a single field in my case sold from the following code.

[Code]....

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Web Forms :: Passing Text Box Value From Aspx.cs Page To SelectParameters In Page

Sep 5, 2010

I would like to take a value from a text box and pass it as a search parameter to my database. I get the value from my code behind page as follows: protected void btn_click(Object sender, ImageClickEventArgs e)

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Dec 22, 2010

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DataSource Controls :: How To Speed Up Data Access

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I could use some guidance on a better way get get my data than I am using. This way is taking nearly 45 seconds to get the data and bind it to a gridview here are my methods used to get the data

[Code]....

then my data access class is:

[Code]....

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