Namespace name "DataView" could not be found.

I am trying a different approach to my issue.

How do I resolve this error -  "Namespace name "DataView" could not be found."

 <asp:TextBox runat="server" ID="txtAuthors" Text='<%# Bind("AuthorName") %>' />
        <asp:ImageButton runat="server" ID="btnFindAuthors"  OnClick="btnFindAuthors"/>
 
<asp:SqlDataSource runat="server" ID="sqlAuthors" ConnectionString="<%$ ConnectionStrings:Libros %>" ProviderName="<%$ ConnectionStrings:Libros.ProviderName %>" 
        SelectCommand="SELECT * FROM AuthorNames ORDER BY AuthorName" 
        InsertCommand="GET_AuthorNames" InsertCommandType="StoredProcedure">
        <InsertParameters>
            <asp:ControlParameter ControlID="txtAuthorName" Name="authorname" />
        </InsertParameters>
    </asp:SqlDataSource>

     <asp:GridView runat="server" ID="gvAuthors" DataSourceID="sqlAuthors" DataKeyNames="AuthorID" AutoGenerateColumns="false">
            <Columns>
                <asp:HyperLinkField HeaderText="Author Name" DataNavigateUrlFormatString="~/Author_Details.aspx?id={0}" DataNavigateUrlFields="AuthorID" DataTextField="AuthorName" />
                <asp:BoundField DataField="AuthorID" HeaderText="AuthorID" Visible = "False" />
       
            </Columns>
           
        </asp:GridView>
 

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 protected void btnFindAuthors(Object sender, EventArgs e)
    {
        
        DataView DV = new DataView(authorid);
        DV.RowFilter = string.Format("AuthorName LIKE '%{0}%'", txtAuthorName.text);
        gvAuthors.DataSource = DV;

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My .axms page does include this:
using System.Data;  

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programmherAsked:
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Jacques Bourgeois (James Burger)PresidentCommented:
Try specifying the namespace in your declaration:

System.Data.DataView DV = new System.Data.DataView(authorid);
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programmherAuthor Commented:
This resolved the error:  <%@ Import Namespace="System.Data" %>
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programmherAuthor Commented:
I used both solutions and they resolved the error.  All points awadred to JamesBurger
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