DataBinding: 'System.Data.DataRowView' does not contain a property with the name

1- First step you have to select the Documentid column in SELECT statement

SelectCommand="SELECT [DocumentID], [DocumentTitle], [DocumentBody] FROM [tblDocument]" />

2- You have to include it in datagridview COLUMN as you did:

<asp:GridView ID="GridView1" runat="server" DataSourceID="sdsDocuments" EnableModelValidation="True"
        SelectedIndex="0" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" DataKeyNames="DocumentID, DocumentTitle, DocumentBody">
        <Columns>
            <asp:BoundField DataField="DocumentID" HeaderText="DocumentID" ReadOnly="True" SortExpression="ID" />
            <asp:BoundField DataField="DocumentTitle" HeaderText="DocumentTitle" SortExpression="Title" />
            <asp:BoundField DataField="DocumentBody" HeaderText="DocumentBody" SortExpression="Body" />
            <asp:CommandField ShowSelectButton="True" ShowDeleteButton="True" />
        </Columns>
    </asp:GridView>

3- If you are using Paging in datagridview AllowPaging="True" ,you have to SELECT also documentid on the event OnSelectedIndexChanged="GridView1_SelectedIndexChanged" to SELECT data in second and third page and so on:

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" DataSourceID="sdsDocuments" EnableModelValidation="True"
        SelectedIndex="0" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" DataKeyNames="DocumentID, DocumentTitle, DocumentBody">

Then on the event OnSelectedIndexChanged="GridView1_SelectedIndexChanged" :

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
                DataTable dt = // your SELECT statement //
                GridView1.DataSource = dt;
                GridView1.PageIndex = e.NewPageIndex;
                GridView1.DataBind();
}

if you dont use this void then you will get same error when you click page 2

Well, you haven't selected the documentid column and hence it's not present in either datatable or dataview which you are binding to grid OR referencing that column through datatable.

Change your query to

 SelectCommand="SELECT [DocumentID],[DocumentTitle], [DocumentBody] FROM [tblDocument]" />