Question

我想要INSERT INTO表值，其中一个是动态的。如下所示，我在.cs中写了这个：

 query = "SELECT " + outColumn + " FROM [Proizvodnja].[dbo].[v_time] WHERE textile LIKE '" + outTextile + "'";
 SqlConnection cn = new SqlConnection("Data Source=***.***.***.***, 1433; Initial Catalog=******;User ID=******;Password=******;");
        SqlCommand dataCommand = new SqlCommand(query, cn);

        cn.Open();
        SqlDataReader rdrOrder = dataCommand.ExecuteReader();
        while (rdrOrder.Read())
        {
            tv_min_String = rdrOrder.GetValue(0).ToString();
            tv_min = double.Parse(tv_min_String);

        }
        rdrOrder.Close();
        cn.Close();

我检查了第一个查询，没关系。现在，我希望在下一个插入statemet中使用tv_min值，插入表：

 <asp:SqlDataSource ID="insertOrder_plan_SqlDataSource" runat="server"
 InsertCommand="INSERT INTO [Production].[dbo].[order_plan] (...,[v_time]) VALUES (..., @tv_min)">
 ...
 <InsertParameters>
     <asp:Parameter Name="tv_min" DefaultValue="<%= tv_min %>/>" Type="Decimal"/>
 </InsertParameters>

当我输入需要apears错误消息的时候：

 An exception of type 'System.FormatException' occurred in mscorlib.dll but was not handled in user code
 Additional information: Input string was not in a correct format.

有什么不对？

Answer 1

尝试使用Double.TryParse而不是Double.Parse。它更安全

 Double.TryParse(tv_minString, tv_min))

具有动态给定值的ASP.NET INSERT语句

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