i have a mysql database and a sql server database.there is a link between these two tables via a foreign key.is it possible to connect two datasources together in my datamodel? if so please can someone tell me how i can do this? i have them both present in the data model, i just want to be able to link the two databases together.i am using asp.net mvc, c# and entity framework - all in visual studio 2008
View 4 Replies
I have one grid in which i use one datasource to get several data . Now i want to ad a column in my grid and bind that column with a column from another datasource.
View 9 RepliesI've been filtering my gridviews with the FilterExpression of the underlying ObjectDataSource etc. I am wondering how I can implement filtering on my GridViews if I just directly databind it to a datatable etc?
View 5 RepliesIs it possible to bind two separated datasources to one dropdown list such that they are both alphabetically sorted and seprated by some sort of line. I know there is a way to insert elemets manually, but I'm not sure of the 2 separate datasources. I've serached this forum and while there were several posts none of them offered any workable solution.
View 5 RepliesEssentially, this is what I have:I have a view form for an object in MVC. On this form, I have a hyperlink. Every time that the user clicks the hyperlink, I would like an integer value inside of the object to increase by one, in addition to redirecting the user to a different page.Is there a way to do this and keep track of how many times the link is clicked?
View 3 Repliesmy application have two tables. TableA and TableB TableA have one record
ID StudentName Age
1 MARK 20
I use selectlist to select StudentName .
ViewData["StudentName"] = new SelectList(_db.StudentSet.ToList(), "StudentName", "StudentName");
and then add to TableB. for this case , for me is success, but I also want to add the"Age" into TableB on same time. I don't know how to do it.
I need to get the Id that matches some other piece of data for a link
example link.
http://localhost:3087/CPNCMS/visitoraccess/InitApprove.aspx?Id=5
I have this as it is now, i just cant get it to work for me
aspx file
<p align="center">
<asp:TextBox ID="TextBox1" runat="server">Case number</asp:TextBox>
</p>
<p align="center">
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit"
[Code]....
MVCThe generated ADO.NET Entity Data Model loses ordinal positions of columns and reorders Entity Set column names alphabetically. This causes the columns in a new MVC VIEW to appear alphabetically and needs to be reordered by hand. I am using MySQL Database.
How can I retain the ordinal positions of columns?
i'm working in visual studio 2005 c#
how do i change gridview datasource by clicking a link ;
how do i insert code to the onclick evvent to change the data source ?
I have two AccessDataSources each returning one row.
I want to use the data in each row to populate content on my page, so I figured I would use a [Code].... or [Code].....
However, I would not necessarily want the labels bound to a particular DataSource placed together.
For example, I might want labels from the following columns in order [Code]....
:
[Code]....
Note: No language preference (C#/VB).
I have a gridview. Its data is populated programmatically by a switch :
string c = dropdownlist1.Text;
switch (c) {
case "abuse":
gridview.datasourceid = sqlview1;[code]...
I want to change the color of the field with service count > 2
I tried to look at ondatabound event handler but my issue is being able to look through the data and change the color conditionally.
i saw this post on[URL] so the problem is .... if there is a datasource in some editeitem template in grid view .... it won't be accessible from out of the edit-item field.....
here's my code...
[Code]....
that i have here is ID-column which contains a linqdatasource taking a where parameter from a dropdownlist and they are both in the same edit-template field.
and i have in another column (CourseTypeID-column ... edit-item template) a dropdownlist ..... now this dropdownlist i want to bind it to the linqdatasource exists in the ID-column (edit-item template)..... is that possible in the designer (or from) not code behind ..... and how ????
I'm trying to build a link to an external website using some properties of my model class in my view page, e.g. I want it to render as something like -[URL]where post-id would be pulled from the model (I'm using a strongly typed view model here - I can't use ViewData as there's a list of items being pulled back all of which need seperate links).I tried doing < a href="<% model.PermaLink(); %>">, where PermaLink is just some string, however the value doesn't get picked up.If I try < a href="<%= model.PermaLink %>">, I get an error - CS1502: The best overloaded method match for 'System.IO.TextWriter.Write(char)' has some invalid argumentsIs there any way to do this? I tried adding the runat="server" attribute, however this just linked to my local site and controller/model actions.
View 2 RepliesHow to open a model popup on click the link.
View 2 RepliesI can't to understand clearly how to create strong and quickly application using EF. For example, I have class ForumPost (table ForumPost) for select one of record I write method like:
public ForumPost ForumPost(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
where i.ForumPostID == ForumPostID select i).First();
}
all works. But on page (I use ASP.NET MVC) I should display info from another linked tables, ForumName (each post have ForumID) etc. So, I modify this method to:
public ForumPost ForumPost(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
.Include("ChildPosts").Include("ParentPost").Include("Users").Include("Forums").Include("Tags").Include("ForumPostPolls")
where i.ForumPostID == ForumPostID select i).First();
}
ok, all works. Then I want to make some actions in model with ForumPost, i.e.
public void RootPost(int PostID, ref Models.ForumPost Root)
{
ForumPost post = ForumPost(PostID);
if (post.RootPost != null)
{
Root = ForumPost(post.RootPost.ForumPostID);
}
else
Root = post;
}
it works too. But problem is in speed. I not need in RootPost all those includes. So, I should to create one more method like:
private ForumPost ForumPostIncludes1(int ForumPostID)
{
return
(from i in _dataContext.ForumPostSet
.Include("ChildPosts")
where i.ForumPostID == ForumPostID
select i).First();
}
then ForumPostIncludes2, ForumPostIncludes3 etc... second way - redesign RootPost with LINQ expr, not with call another method. But in this way difficulties to change DB. third way? How to do it correctly?
I am saving different file formats as varbinary in a SQL Server 2005. The web application is VS 2005 using VB.
How can I put a link in a page to the file saved in the database?
Ive created a form on my website. what i want to do is when the user clicks finish at the end of the form, i want all that information to be sent to a table that is in sql server. does anyone know a) if thats possible? and b) what code i would need to put in vb?
View 4 RepliesI am using the query listed below which includes multiple joins, in the result of the query I need to do some value replacement valuesExample: db.ASSETS.BUILDING_ID=300 that ID does not exist in db.BUILDINGS, in that case I need to return BUILDING_ID=0, db.BUILDINGS.NAME="Unassigned"
[Code]....
i am currently working on a small project in which i have to build a web form and link that to a database...thing is, i don't even know where to begin!Once i build my database, how do i link that to my website? directing me to an appropriate tutorial on how i can do this?
one of the main things i'd like to do is to connect to a database, get info, and with that info, build a list for a drop down menu for the user to select. is that at all possible?
I'm trying to link 2 objectdatasource together using the Control Parameter Source.However, I'm stuck at the screenshot below. The Next button is disabled.
View 1 RepliesI have a database table column consisting of text URLs [URL] In my LINQ-to-SQL-driven gridview, I want to make this a clickable link programmatically, with differing link text (e.g. "Link text"). I'm getting close but am missing some key concept. Here's the core of the .vb codebehind:
Dim dctx As New ResourceMod.ResourceModDALDataContext
Dim eleResObj = From eleRes In dctx.Resources Where eleRes.Type = "url" Select siteurl = eleRes.Website
GridView1.DataSource = eleResObj
GridView1.DataBind()
This displays the raw URL in the gridview (i.e. non-clickable). I've experimented with adding an explicit hyperlink column a la [URL](setting AutoGenerateColumns false etc.), but haven't yet figured out how to assign the asp:hyperlink Text and NavigateUrl fields with the anonymous-type object eleResObj. Using a field construct such as Text='<%# Eval("siteurl") %>' isn't working, presumably a scope issue. Is a LinqDataSource needed in this case, and if so, how would that affect the original LINQ query?
problem: bad design but this is what they want.I have a datasource which binds to a dropdownlist. This is fine. this displays companies (with companyID as the DataValueField)they then, underneath, want a seperator and then after that, a list of "groups".of course, DDL cannot have multiple Datasources. So how can I bind from 2 sources into 1 DDL? I cannot seem to think of a way. Even adding the items at the end of the databinding will not help as the GroupID maybe the same as a CompanyID for the DataValue.
View 4 RepliesI've been used to decorating data model classes with data annotation attributes, but the purist in me baulks slightly at including purely presentational attributes such as display format here. I am, however, quite happy to keep validation centric attributes here. One good reason I have to continue keeping all annotations etc. in the data model is that my view model aggregates data model classes, e.g.
my ViewModelBase.DetailItem<TEntity> property in the view model is just a reference to an entity class in my data model. If I wanted to move presentational annotations to the view model, I would have to quite radically revise my design to one where I duplicate data model properties in my view model and use an object mapping tool to populate view model objects based on data model objects.
[code]....
I have an ObjectDataSource (but perhaps this question is the same for all kinds of DataSources which support parameter collections):
<asp:ObjectDataSource ID="MyObjectDataSource" runat="server"
TypeName="MyData"
OldValuesParameterFormatString="original_{0}"
SelectMethod="GetMyData" >
<SelectParameters>
<asp:ControlParameter ControlID="MyTextBox" Name="MyParameter" Type="String" />
</SelectParameters>
</asp:ObjectDataSource>
As you can see there is a ControlParameter bound to a TextBox on the aspx page. So the content of this TextBox is a parameter for my SelectMethod. But there is a special button on the page: When this button is clicked and a postback occurs I don't want that the DataSource extracts the content of the TextBox to control the selection, instead I want to set a specific hard value "x" as the selection parameter.
How can I do that? Can I "disable" in some way the ControlParameter when this specific button is clicked and set my special value instead? Or is there any other way?
How do you control database server access when you use datasources in VB 2010?How do you access multiple tables from a store procedure using datasources?
Explanation:My experience is with VB.NET for the most part. I've written a lot of apps drawing data through dataadapters into datasets and processing them to provide reports in aspx.
I'm starting to work in VB 2010 and those elements are no longer available. What appears to be the weapon of choice is the datasource.What I'm not seeing: 2 important things that I can't work without:
1. Control over when the database server is hit with a connection request; daMyQuery.Fill (MyDataSet) was an explicit command that I could use to collect my data on demand. From that point on, I could use the dataset as I wished to populate whatever controls or structures I wished - the database server was no longer needed and wasn't hit by my apps until another pageload.
2. Multiple Tables in a query result; This must be there, I just can't find the method by which to reference different tables in my SQL output. Previous, I would have a dataadapter which would use a stored procedure to deliver a dataset of multiple - sometimes many - tables for use in the application. I can't find the equivalent on a datasource.
So my two big-ticket needs - requests for assistance, really - are listed above: How do you get at multiple tables returned from a stored procedure;and;How do you keep datasources for hitting the dbserver whenever you use it if there is no equivalent to a 'fill' method?
I guess another - how would you walk through the rows of a dataset?
