主题：老大,帮我看个SQL语句的问题

Dim Val As String
If InputValue(Val, "保存设置", "请输入要保存设置的名字:") Then
    Dim tr As WinForm.TreeView
    Dim nd As WinForm.TreeNode
    tr = e.Form.Controls("TreeView1")
    nd = Tr.Nodes.Add(Val,Val)
    Dim dt As DataTable = DataTables(e.Form.Name & "_Table1")
    Dim Str As String
    For Each dr As DataRow In dt.DataRows
        Str = Str & "|" & dr("公式")
    Next
    Dim cmd As New SQLCommand
    cmd.C
    cmd.CommandText = "Update {保存设置] Set [保存设置] = '" & nd.Name & "',[保存字符串] ='" & Str & "'"
    cmd.ExecuteNonQuery
End If

     保存字符串提示说,缺少:

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  是什么原因?