2

好的，所以我刚刚编写了自己的“将一本书添加到数据库”ASP.net 页面，如下所示：

<div class="addbook"><br />If you feel that we&#39;ve forgotten a book
that you love, please fill out this form 
below to help us keep the site fresh and dynamic!
<h3>Title:</h3><asp:TextBox ID="tb_booktitle" runat="server"></asp:TextBox>
<h3>Author:</h3><asp:TextBox ID="tb_bookauthor" runat="server"></asp:TextBox>
<h3>Publication Date:</h3><asp:TextBox ID="tb_bookpubyear" runat="server" ></asp:TextBox>    <asp:CompareValidator
ID="CompareValidatorTextBox1" runat="server"
ControlToValidate="tb_bookpubyear"
Type="Date"
Operator="DataTypeCheck" 
ErrorMessage="Date must be in the DD/MM/YYYY format)" ForeColor="Red"
/>
<h3>Number of Pages:</h3><asp:TextBox ID="tb_bookpages" runat="server"></asp:TextBox><asp:RangeValidator ID="RangeValidator1" runat="server" 
    ControlToValidate="tb_bookpages" 
    ErrorMessage="Please enter a number." ForeColor="Red" 
    MaximumValue="9999999" MinimumValue="1" SetFocusOnError="True"></asp:RangeValidator>


<h3>Publisher:</h3><asp:TextBox ID="tb_publisher" runat="server"></asp:TextBox>
<h3>Book Cover:</h3>
<asp:FileUpload ID="fu_picture" runat="server" />
<h3>Your Rating:</h3>
<p>    
    <asp:RadioButtonList ID="rbl_Stars" runat="server" 
    RepeatDirection="Horizontal" Width="142px">
    <asp:ListItem>1</asp:ListItem>
    <asp:ListItem>2</asp:ListItem>
    <asp:ListItem>3</asp:ListItem>
    <asp:ListItem>4</asp:ListItem>
    <asp:ListItem>5</asp:ListItem>
</asp:RadioButtonList>
</p>
<p>
    <asp:Button ID="btn_submission" runat="server" Text="Upload Book!" />
</p>

以及背后的代码：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

End Sub

Protected Sub btn_submission_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn_submission.Click
    Dim myGUID = Guid.NewGuid()

    Dim newFileName As String = myGUID.ToString() & ".jpg"
    Dim fileLocationOnServerHardDisk = Request.MapPath("img/thumb") & "/" & newFileName
    fu_picture.SaveAs(fileLocationOnServerHardDisk)
    Dim oleDbConn As New OleDb.OleDbConnection(ConfigurationManager.ConnectionStrings("BookMeetConnString").ConnectionString)
    Dim SqlString As String = "Insert into booklist(Title,Author,PublicationDate,Pages,Publisher,imgurl,AverageRating)
Values (@f1,@f2,@f3,@f4,@f5,@f6,@f7)"
    Dim cmd As OleDbCommand = New OleDbCommand(SqlString, oleDbConn)
    cmd.CommandType = CommandType.Text
    cmd.Parameters.AddWithValue("@f1", tb_booktitle.Text)
    cmd.Parameters.AddWithValue("@f2", tb_bookauthor.Text)
    cmd.Parameters.AddWithValue("@f3", tb_bookpubyear.Text)
    cmd.Parameters.AddWithValue("@f4", tb_bookpages.Text)
    cmd.Parameters.AddWithValue("@f5", tb_publisher.Text)
    cmd.Parameters.AddWithValue("@f6", "img/thumb/" & newFileName)
    cmd.Parameters.AddWithValue("@f7", rbl_Stars.SelectedValue)
    oleDbConn.Open()
    cmd.ExecuteNonQuery()
    Response.Redirect("detail.aspx?ID={0}")

End Sub

Protected Sub rbl_Stars_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles rbl_Stars.SelectedIndexChanged

End Sub 
End Class

正如您在上面的代码中看到的那样，一旦建立了与数据库的连接，我想使用查询字符串重定向到 detail.aspx（这是一个显示来自数据库和相关内容的单个书籍记录的页面）显示刚刚添加的记录。但我收到这样的错误：

输入字符串的格式不正确。说明：执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。

异常详细信息：System.FormatException：输入字符串的格式不正确。

源错误：

在执行当前 Web 请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常起源和位置的信息。

堆栈跟踪：

[FormatException: 输入字符串格式不正确。]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +10722195 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info ) +145
System.String.System.IConvertible.ToInt32(IFormatProvider provider) +46 System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) +297
System.Web.UI.WebControls.Parameter.GetValue(Object value, String defaultValue, TypeCode type, Boolean convertEmptyStringToNull, Boolean ignoreNullableTypeChanges) +126
System.Web.UI.WebControls.Parameter.GetValue(Object value, Boolean ignoreNullableTypeChanges) +63
System.Web.UI.WebControls.Parameter.get_ParameterValue() +40
System.Web.UI.WebControls.ParameterCollection.GetValues(HttpContext context, Control control) +247
System.Web.UI.WebControls.SqlDataSourceView.InitializeParameters(DbCommand 命令, ParameterCollection 参数，IDictionary excludeList）+257 System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect（DataSourceSelectArguments 参数）+589
System.Web.UI.DataSourceView.Select（DataSourceSelectArguments 参数，DataSourceViewSelectCallback 回调）+21
System.Web.UI.WebControls .DataBoundControl.PerformSelect() +138
System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +30
System.Web.UI.WebControls.GridView.DataBind() +4
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +105 System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +75 System.Web.UI.Control.EnsureChildControls() +83 System.Web.UI.Control .PreRenderRecursiveInternal() +42
System.Web.UI.Control.PreRenderRecursiveInternal() +168
System.Web.UI.Control.PreRenderRecursiveInternal() +168
System.Web.UI.Control.PreRenderRecursiveInternal() +168
System.Web.UI .Control.PreRenderRecursiveInternal() +168
System.Web.UI.Page.ProcessRequestMain(布尔 includeStagesBeforeAsyncPoint，布尔 includeStagesAfterAsyncPoint) +974

我将如何去实现我想要做的事情？

4

1 回答 1

1

为什么不创建一个存储过程，其输出参数为新插入的书的 id，然后执行以下操作

If outputparam.value isnot nothing then
    Response.Redirect(String.Format("detail.aspx?ID={0}",outputparam.value)
end if

请查看此网址以获取更多信息。

输入和输出参数以及返回值

于 2013-03-11T21:15:49.583 回答