Problem in Declaratively using Delete Command in ASP.NET

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Hello People,

- i have used a details view so as to display the data from my table named "contacts" it has 2 columns "Contact" and "Name".

- I have used an SQL data source control: like this

SQLDATASOURCE control:

<asp:SqlDataSource ID="sql" runat="server" ConnectionString="<%$ ConnectionStrings:contacts %>"  UpdateCommand="update contacts set Name=@Name where Contact=@Contact" DeleteCommand="Delete from contacts where Contact=@Contact " InsertCommand="Insert into contacts (Name,Contact) values(@Name,@Contact)" SelectCommand="select Name,Contact from contacts" />

So after running this page i get an error :

Must declare the scalar variable "@Contact".

Kindly Advice
Thanks,

Posted 22-Aug-13 10:24am

Rahul VB

Updated 22-Aug-13 10:27am

Richard C Bishop

v2

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Richard C Bishop 22-Aug-13 16:27pm

You are not passing a value for @Contact, it needs one.

Maarten Kools 22-Aug-13 16:28pm

How are you specifying the query parameters to the datasource?

Rahul VB 22-Aug-13 16:38pm

I have two fields :

Name, Contact
I have used details view for displaying these fields.
I have used Declarative data binding and here is the Details View control's code :

<asp:DetailsView id="dv" DataSourceID="sql" AllowPaging="true" AutoGenerateEditButton="true" AutoGenerateDeleteButton="true" AutoGenerateInsertButton="true" AutoGenerateRows="false" CssClass="detailsview" PagerSettings-Mode="NumericFirstLast" runat="server"><fields><asp:BoundField DataField="Name" HeaderText="Person Name" InsertVisible="true" /><asp:BoundField DataField="Contact" HeaderText="Contact" ReadOnly="false" />

- Can you please explain me the significance of "@" symbol?
- What is the difference in using the @ symbol for delete command vs all other commands.
- May be i have used it wrongly

Thanks,

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