在表现层使用DetailView的插入数据的时候，输入字符串的格式不正确。

在表现层使用DetailView的插入数据的时候，输入字符串的格式不正确。
我的数据表名称：calMainRecords
数据表结构及其数据类型：
ID char(6) 不容许空
Equipment_Name varchar(50) 容许空
Use_Place_ID int 不容许空
Cal_Date datetime 不容许空
Due_Date datetime 不容许空
Cal_Cycle_ID int 不容许空
Vender varchar(50) 容许空
Brand varchar(50) 容许空
Model varchar(50) 容许空
Serial_NO varchar(50) 容许空
Accuracy varchar(50) 容许空
Class char(1) 不容许空
Project_ID int 不容许空
Process_ID int 不容许空
Status char(1) 不容许空
WI_NO char(12) 不容许空
Drawing_NO char(12) 容许空
Renter_ID int 容许空
Rent_Date datetime 容许空
Sign_ID int 不容许空
Re varchar(255) 容许空
我的方法:   public bool AddcalMainRecords(String equipment_Name, DateTime? cal_Date, DateTime? due_Date, String vender, String brand, String model, String serial_NO, String accuracy, String myclass, String status, String WI_NO, String drawing_NO, String re, int id)
    {
        // 新建一个calMainRecordsRow实例
        cal.calMainRecordsDataTable mycals = new cal.calMainRecordsDataTable();
        cal.calMainRecordsRow mycal = mycals.NewcalMainRecordsRow();
        mycal.Equipment_Name = equipment_Name;
        if (equipment_Name == null) mycal.SetEquipment_NameNull(); else mycal.Equipment_Name = equipment_Name;
        if (vender == null) mycal.SetVenderNull(); else mycal.Vender = vender;
        if (brand == null) mycal.SetBrandNull(); else mycal.Brand = brand;
        if (model == null) mycal.SetModelNull(); else mycal.Model = model;
        if (serial_NO == null) mycal.SetSerial_NONull(); else mycal.Serial_NO = serial_NO;
        if (accuracy == null) mycal.SetAccuracyNull(); else mycal.Accuracy = accuracy;
        if (drawing_NO == null) mycal.SetDrawing_NONull(); else mycal.Drawing_NO = drawing_NO;
        //少了Renter_ID和Rent_Date
        if (re == null) mycal.SetReNull(); else mycal.Re = re;
        mycals.AddcalMainRecordsRow(mycal);
        int rowsAffected = Adapter.Update(mycals);
        // 如果刚好新增了一条记录，则返回true，否则返回false
        return rowsAffected == 1;
    }
表现层前台代码：
<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="BasicEdit.aspx.cs" Inherits="Basic_BasicEdit" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server">
    <asp:DetailsView ID="DetailsView1" runat="server" 
    DataSourceID="objGetDatas" Height="50px" Width="125px" 
        AutoGenerateRows="False" DataKeyNames="ID">
    <Fields>
        <asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" 
            SortExpression="ID" />
        <asp:BoundField DataField="Equipment_Name" HeaderText="Equipment_Name" 
            SortExpression="Equipment_Name" />
        <asp:BoundField DataField="Cal_Date" HeaderText="Cal_Date" 
            SortExpression="Cal_Date" />
        <asp:BoundField DataField="Due_Date" HeaderText="Due_Date" 
            SortExpression="Due_Date" />
        <asp:BoundField DataField="Vender" HeaderText="Vender" 
            SortExpression="Vender" />
        <asp:BoundField DataField="Brand" HeaderText="Brand" SortExpression="Brand" />
        <asp:BoundField DataField="Model" HeaderText="Model" SortExpression="Model" />
        <asp:BoundField DataField="Serial_NO" HeaderText="Serial_NO" 
            SortExpression="Serial_NO" />
        <asp:BoundField DataField="Accuracy" HeaderText="Accuracy" 
            SortExpression="Accuracy" />
        <asp:BoundField DataField="Class" HeaderText="Class" SortExpression="Class" />
        <asp:BoundField DataField="Status" HeaderText="Status" 
            SortExpression="Status" />
        <asp:BoundField DataField="WI_NO" HeaderText="WI_NO" SortExpression="WI_NO" />
        <asp:BoundField DataField="Drawing_NO" HeaderText="Drawing_NO" 
            SortExpression="Drawing_NO" />
        <asp:BoundField DataField="Re" HeaderText="Re" 
            SortExpression="Re" />
        <asp:CommandField ShowInsertButton="True" />
    </Fields>
</asp:DetailsView>
<br />
    <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
        DataKeyNames="ID" DataSourceID="objGetDatas" OnRowDataBound="GridView1_RowDataBound">
        <Columns>
            <asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" SortExpression="ID" />
            <asp:BoundField DataField="Equipment_Name" HeaderText="Equipment_Name" SortExpression="Equipment_Name" />
            <asp:BoundField DataField="Cal_Date" HeaderText="Cal_Date" SortExpression="Cal_Date" />
            <asp:BoundField DataField="Due_Date" HeaderText="Due_Date" SortExpression="Due_Date" />
            <asp:BoundField DataField="Vender" HeaderText="Vender" SortExpression="Vender" />
            <asp:BoundField DataField="Brand" HeaderText="Brand" SortExpression="Brand" />
            <asp:BoundField DataField="Model" HeaderText="Model" SortExpression="Model" />
            <asp:BoundField DataField="Serial_NO" HeaderText="Serial_NO" SortExpression="Serial_NO" />
            <asp:BoundField DataField="Accuracy" HeaderText="Accuracy" SortExpression="Accuracy" />
            <asp:BoundField DataField="Class" HeaderText="Class" SortExpression="Class" />
            <asp:BoundField DataField="Status" HeaderText="Status" 
                SortExpression="Status" />
            <asp:BoundField DataField="WI_NO" HeaderText="WI_NO" SortExpression="WI_NO" />
            <asp:BoundField DataField="Drawing_NO" HeaderText="Drawing_NO" 
                SortExpression="Drawing_NO">
            </asp:BoundField>
            <asp:BoundField DataField="Re" HeaderText="Re" 
                SortExpression="Re" />
        </Columns>
    </asp:GridView>
    <asp:ObjectDataSource ID="objGetDatas" runat="server" OldValuesParameterFormatString="original_{0}"
        SelectMethod="GetCalDatas" TypeName="calBLL" 
        InsertMethod="AddcalMainRecords">
        <InsertParameters>
            <asp:Parameter Name="equipment_Name" Type="String" />
            <asp:Parameter Name="cal_Date" Type="DateTime" />
            <asp:Parameter Name="due_Date" Type="DateTime" />
            <asp:Parameter Name="vender" Type="String" />
            <asp:Parameter Name="brand" Type="String" />
            <asp:Parameter Name="model" Type="String" />
            <asp:Parameter Name="serial_NO" Type="String" />
            <asp:Parameter Name="accuracy" Type="String" />
            <asp:Parameter Name="myClass" Type="String" />
            <asp:Parameter Name="status" Type="String" />
            <asp:Parameter Name="WI_NO" Type="String" />
            <asp:Parameter Name="drawing_NO" Type="String" />
            <asp:Parameter Name="re" Type="String" />
            <asp:Parameter Name="id" Type="Int32" />
        </InsertParameters>
    </asp:ObjectDataSource>
</asp:Content>