'。'附近的语法不正确。 [英] Incorrect syntax near '.'.

问题描述

我正在使用ASP.net框架+ SQL。所以无论如何，我正在尝试检索一个数据，它告诉我在'。'附近有一个不正确的语法。我不明白。它说我的问题的根源是第81行，它是

Quote：

SqlDataReader dr = com.ExecuteReader（）;

以下是我的代码。

Edit_DVO.aspx

<％@ Page Title =Language =C＃MasterPageFile =〜/ Administrator / Operations.master
 AutoEventWireup =trueCodeFile =Edit_DVO.aspx.csInherits =OperationsDepartment.Operations.Edit_DVO％> 
< asp：Content ID =Content1ContentPlaceHolderID =headrunat =server> 
< / asp：Content> 
< asp：Content ID =Content2ContentPlaceHolderID =ContentPlaceHolder1runat =server> 
< div id =page-wrapper> 
< div class =row> 
< div class =col-lg-12> 
< h1 class =page-header> 
编辑DVO详细信息< / h1> 
< / div> 
<！ -  /.col-lg-12  - > 
< / div> 
<！ -  /.row  - > 
< div class =row> 
< div class =col-lg-12> 
< div class =panel panel-default> 
< div class =panel-heading> 
查看用户＃< asp：Literal ID =ltIDrunat =server/> 
< / div> 
< form role =formid =form1> 
< div class =panel-body> 
< div class =row> 
< div class =col-lg-6> 
< div class =form-group> 
< label> 
客户姓氏< / label> 
< asp：TextBox ID =txtLNrunat =serverclass =form-controlplaceholder =姓氏
 required /> 
< / div> 
< div class =form-group> 
< label> 
客户名字< / label> 
< asp：TextBox ID =txtFNrunat =serverclass =form-controlplaceholder =First Name
 required /> 
< / div> 
< div class =form-group> 
< label> 
经销商名称< / label> 
< asp：TextBox ID =txtDNrunat =serverclass =form-controlplaceholder =Name
 required /> 
< / div> 
< div class =form-group> 
< label> 
数量< / label> 
< asp：TextBox ID =txtQrunat =serverclass =form-controlplaceholder =Quantity
 required /> 
< / div> 
< div class =form-group> 
< label> 
型号< / label> 
< asp：DropDownList ID =ddlModrunat =serverclass =form-control> 
< / asp：DropDownList> 
< / div> 
 
< div class =form-group> 
< label> 
报价参考号< / label> 
< asp：TextBox ID =txtQRrunat =serverclass =form-controlplaceholder =Quotation Referencerequired /> 
< / div> 
< div class =form-group> 
< label> 
总金额< / label> 
< asp：TextBox ID =txtTArunat =serverclass =form-controlplaceholder =Total Amount
 required /> 
< / div> 
< / br> 
< / div> 
<！ -  /.col-lg-6（嵌套） - > 
< div class =col-lg-6> 
< div class =form-group> 
< label> 
付款条件< / label> 
< asp：DropDownList ID =ddlPTrunat =serverclass =form-control> 
< / asp：DropDownList> 
< / div> 
< div class =form-group> 
< label> 
目标交付< / label> 
< asp：TextBox ID =txtTDrunat =serverclass =form-controlplaceholder =Target Deliveryrequired /> 
< / div> 
< div class =form-group> 
< label> 
状态< / label> 
< asp：DropDownList ID =ddlStatusrunat =serverWidth =200px> 
< asp：ListItem Text =ApprovedValue =Approved>< / asp：ListItem> 
< asp：ListItem Text =待定值=待定>< / asp：ListItem> 
< / asp：DropDownList> 
< / div> 
< div class =form-group> 
< label> 
已收到< / label> 
< asp：DropDownList ID =ddlIRrunat =server> 
< asp：ListItem Text =YesValue =True>< / asp：ListItem> 
< asp：ListItem Text =NoValue =False>< / asp：ListItem> 
< / asp：DropDownList> 
< / div> 
< div class =form-group> 
< label> 
已批准< / label> 
< asp：DropDownList ID =ddlIArunat =server> 
< asp：ListItem Text =YesValue =True>< / asp：ListItem> 
< asp：ListItem Text =NoValue =False>< / asp：ListItem> 
< / asp：DropDownList> 
< / div> 
< div class =form-group> 
< label> 
已评估< / label> 
< asp：DropDownList ID =ddlIErunat =server> 
< asp：ListItem Text =YesValue =True>< / asp：ListItem> 
< asp：ListItem Text =NoValue =False>< / asp：ListItem> 
< / asp：DropDownList> 
< / div> 
< div class =form-group> 
< label> 
已处理< / label> 
< asp：DropDownList ID =ddlIPrunat =server> 
< asp：ListItem Text =YesValue =True>< / asp：ListItem> 
< asp：ListItem Text =NoValue =False>< / asp：ListItem> 
< / asp：DropDownList> 
< / div> 
< / div> 
<！ -  /.col-lg-6（嵌套） - > 
< / div> 
< asp：Button ID =btnCancelrunat =serverclass =btn btn-defaultText =CancelPostBackUrl =〜/ Operations / DVO_History.aspx
 formnovalidate /> ; 
< asp：按钮ID =btnSubmit_Editrunat =serverclass =btn btn-successText =提交按钮
 OnClick =btnSubmit_Edit_Click/> 
<！ -  /.row（嵌套） - > 
< / div> 
< / form> 
<！ -  /.panel-body  - > 
< / div> 
<！ -  /.panel  - > 
< / div> 
<！ -  /.col-lg-12  - > 
< / div> 
<！ -  /.row  - > 
< / div> 
< / asp：Content> 

Edit_DVO.asx.cs

使用系统; 
使用System.Collections.Generic; 
使用System.Linq; 
使用System.Web; 
使用System.Web.UI; 
使用System.Web.UI.WebControls; 
使用System.Data.SqlClient; 
使用System.Data; 
 
命名空间OperationsDepartment.Operations 
 {
公共部分类Edit_DVO：System.Web.UI.Page 
 {
 SqlConnection con = new SqlConnection（Helper。 GetCon（））; 
 protected void Page_Load（object sender，EventArgs e）
 {
 if（Request.QueryString [ID]！= null）//记录没有选中
 {
 int userID = 0; 
 bool validDVO_ID = int.TryParse（Request.QueryString [ID]。ToString（），out userID）; 
 
 if（validDVO_ID）
 {
 if（！IsPostBack）
 {
 GetModel（）; 
 GetPaymentTerm（）; 
 GetInfo（userID）; 
} 
} 
 else 
 Response.Redirect（DVO_History.aspx）; 
} 
 else 
 Response.Redirect（DVO_History.aspx）; //如果meron na 
}将其更改为主页面
 
 protected void btnSubmit_Edit_Click（object sender，EventArgs e）
 {
 con.Open（）; 
 SqlCommand com = new SqlCommand（）; 
 com.Connection = con; 
 com.CommandText =更新DVO SET LastName = @ LastName，FirstName = @ FirstName，DealerName = @ DealerName，+ 
Qty = @ Qty，Model = @ ProductID，QuotationRefNo = @ QuotationRefNo，TotalAmount = @ TotalAmount，+ 
Term = @ PaymentTermID，TargetDelivery = @ TargetDelivery，Status = @ Status，+ 
IsReceived = @ IsReceived，IsApproved = @ IsApproved，IsEvaluated = @ IsEvaluated，IsProcessed = @IsProcessed WHERE DVO_ID = @ DVO_ID; 
 com.Parameters.AddWithValue（LastName，txtLN.Text）; 
 com.Parameters.AddWithValue（FirstName，txtFN.Text）; 
 com.Parameters.AddWithValue（DealerName，txtDN.Text）; 
 com.Parameters.AddWithValue（Qty，txtQ.Text）; 
 com.Parameters.AddWithValue（ProductID，ddlMod.SelectedValue）; 
 com.Parameters.AddWithValue（QuotationRefNo，txtQR.Text）; 
 com.Parameters.AddWithValue（TotalAmount，txtTA.Text）; 
 com.Parameters.AddWithValue（PaymentTermID，ddlPT.SelectedValue）; 
 com.Parameters.AddWithValue（TargetDelivery，txtTD.Text）; 
 com.Parameters.AddWithValue（Status，ddlStatus.SelectedValue）; 
 com.Parameters.AddWithValue（IsReceived，ddlIR.SelectedValue）; 
 com.Parameters.AddWithValue（IsApproved，ddlIA.SelectedValue）; 
 com.Parameters.AddWithValue（IsEvaluated，ddlIE.SelectedValue）; 
 com.Parameters.AddWithValue（IsProcessed，ddlIP.SelectedValue）; 
 com.Parameters.AddWithValue（DVO_ID，Request.QueryString [ID]。ToString（））; 
 com.ExecuteNonQuery（）; 
 con.Close（）; 
 Response.Redirect（DVO_History.aspx）; 
 
} 
 void GetInfo（int ID）
 {
 con.Open（）; 
 SqlCommand com = new SqlCommand（）; 
 com.Connection = con; 
 com.CommandText =SELECT c.LastName，c.FirstName，dt.DealerName，+ 
d.Qty，p.Model，d.QuotationRefNo，d.TotalAmount，pt.Term，d .TargetDelivery，d.Status+ 
d.IsReceived，d.IsApproved，d.IsEvaluated，d.IsProcessed+ 
来自DVO d+ 
INNER JOIN经销商dt ON d.DealerID = dt.DealerID+ 
INNER JOIN Customer c ON d.CustomerID = c.CustomerID+ 
INNER JOIN Product p ON d.ProductID = p.ProductID+ 
INNER JOIN PaymentTerm pt ON d.PaymentTermID = pt.PaymentTermID WHERE DVO_ID = @ DVO_ID; 
 com.Parameters.AddWithValue（DVO_ID，ID）; 
 SqlDataReader dr = com.ExecuteReader（）; 
 if（dr.HasRows）//记录现有
 {
 while（dr.Read（））
 {
 ddlMod.SelectedValue = dr [Model]的ToString（）; 
 ltID.Text = dr [DVO_ID]。ToString（）; 
 ddlStatus.SelectedValue = dr [Status]。ToString（）; 
 ddlPT.SelectedValue = dr [PaymentTerm]。ToString（）; 
 ddlIR.SelectedValue = dr [IsReceived]。ToString（）; 
 ddlIA.SelectedValue = dr [IsApproved]。ToString（）; 
 ddlIE.SelectedValue = dr [IsEvaluated]。ToString（）; 
 ddlIP.SelectedValue = dr [IsProcessed]。ToString（）; 
 txtFN.Text = dr [FirstName]。ToString（）; 
 txtLN.Text = dr [LastName]。ToString（）; 
 txtDN.Text = dr [DealerName]。ToString（）; 
 txtQ.Text = dr [Qty]。ToString（）; 
 
 txtQR.Text = dr [QuantityRefNo]。ToString（）; 
 txtTA.Text = dr [TotalAmount]。ToString（）; 
 txtTD.Text = dr [TargetDelivery]。ToString（）; 
 
 
} 
 con.Close（）; 
} 
其他//不存在
 {
 con.Close（）; 
 Response.Redirect（DVO_History.aspx）; 
 
} 
} 
 
 
 void GetModel（）
 {
 con.Open（）; 
 SqlCommand com = new SqlCommand（）; 
 com.Connection = con; 
 com.CommandText =SELECT ProductID，Model FROM Product; 
 SqlDataReader dr = com.ExecuteReader（）; 
 ddlMod.DataSource = dr; 
 ddlMod.DataTextField =模型; 
 ddlMod.DataValueField =ProductID; 
 ddlMod.DataBind（）; 
 con.Close（）; 
 
} 
 
 
 void GetPaymentTerm（）
 {
 con.Open（）; 
 SqlCommand com = new SqlCommand（）; 
 com.Connection = con; 
 com.CommandText =SELECT PaymentTermID，Term FROM PaymentTerm; 
 SqlDataReader dr = com.ExecuteReader（）; 
 ddlPT.DataSource = dr; 
 ddlPT.DataTextField =Term; 
 ddlPT.DataValueField =PaymentTermID; 
 ddlPT.DataBind（）; 
 con.Close（）; 
 
} 
 
 
 
 
} 
} 

我尝试了什么：



我尝试在我的SQL Server上使用相同的sql命令文本作品。所以我不知道问题出在哪里。我搜索了我的问题的含义，它说我得到一个空对象，但我知道我没有得到任何空对象。

解决方案

这里有一个简单的语法错误：

   d.Qty，p.Model， d.QuotationRefNo，d.TotalAmount，pt.Term，d.TargetDelivery，d.Status + 
   d.IsReceived，d.IsApproved，d.IsEvaluated，d.IsProcessed + 

在<$之后没有逗号（，） C $ C> d.Status ...

I'm using ASP.net framework + SQL. So anyways, I'm trying to retrieve a data it tells me i have an incorrect syntax near '.'. which I do not understand. It says the source of my problem is at line 81 which is

Quote:

SqlDataReader dr = com.ExecuteReader();

Below is my code.
Edit_DVO.aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Administrator/Operations.master" 
    AutoEventWireup="true" CodeFile="Edit_DVO.aspx.cs" Inherits="OperationsDepartment.Operations.Edit_DVO" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
 <div id="page-wrapper">
        <div class="row">
            <div class="col-lg-12">
                <h1 class="page-header">
                    Edit DVO Details</h1>
            </div>
            <!-- /.col-lg-12 -->
        </div>
        <!-- /.row -->
        <div class="row">
            <div class="col-lg-12">
                <div class="panel panel-default">
                    <div class="panel-heading">
                        View User #<asp:Literal ID="ltID" runat="server" />
                    </div>
                    <form role="form" id="form1">
                    <div class="panel-body">
                        <div class="row">
                            <div class="col-lg-6">
                                <div class="form-group">
                                    <label>
                                        Customer Last Name</label>
                                    <asp:TextBox ID="txtLN" runat="server" class="form-control" placeholder="Last Name"
                                        required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Customer First Name</label>
                                    <asp:TextBox ID="txtFN" runat="server" class="form-control" placeholder="First Name"
                                        required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Dealer Name</label>
                                    <asp:TextBox ID="txtDN" runat ="server" class="form-control" placeholder="Name"
                                        required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Quantity</label>
                                    <asp:TextBox ID="txtQ" runat="server" class="form-control" placeholder="Quantity"
                                        required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Model</label>
                                    <asp:DropDownList ID="ddlMod" runat="server" class="form-control">
                                    </asp:DropDownList>
                                </div>
                               
                                <div class="form-group">
                                    <label>
                                        Quotation Reference No</label>
                                    <asp:TextBox ID="txtQR" runat="server" class="form-control" placeholder="Quotation Reference" required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Total Amount</label>
                                    <asp:TextBox ID="txtTA" runat="server" class="form-control" placeholder="Total Amount"
                                        required />
                                </div>
                                </br>
                            </div>
                            <!-- /.col-lg-6 (nested) -->
                            <div class="col-lg-6">
                                <div class="form-group">
                                    <label>
                                        Payment Term</label>
                                    <asp:DropDownList ID="ddlPT" runat="server" class="form-control">
                                    </asp:DropDownList>
                                </div>
                                <div class="form-group">
                                    <label>
                                        Target Delivery</label>
                                    <asp:TextBox ID="txtTD" runat="server" class="form-control" placeholder="Target Delivery" required />
                                </div>
                                <div class="form-group">
                                    <label>
                                        Status</label>
                                    <asp:DropDownList ID="ddlStatus" runat="server" Width="200px">
                                        <asp:ListItem Text="Approved" Value="Approved"></asp:ListItem>
                                        <asp:ListItem Text="Pending" Value="Pending"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                                <div class="form-group">
                                    <label>
                                        Received</label>
                                    <asp:DropDownList ID="ddlIR" runat="server">
                                        <asp:ListItem Text="Yes" Value="True"></asp:ListItem>
                                        <asp:ListItem Text="No" Value="False"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                                <div class="form-group">
                                    <label>
                                        Approved</label>
                                    <asp:DropDownList ID="ddlIA" runat="server">
                                        <asp:ListItem Text="Yes" Value="True"></asp:ListItem>
                                        <asp:ListItem Text="No" Value="False"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                                <div class="form-group">
                                    <label>
                                        Evaluated</label>
                                    <asp:DropDownList ID="ddlIE" runat="server">
                                        <asp:ListItem Text="Yes" Value="True"></asp:ListItem>
                                        <asp:ListItem Text="No" Value="False"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                                <div class="form-group">
                                    <label>
                                        Processed</label>
                                    <asp:DropDownList ID="ddlIP" runat="server">
                                        <asp:ListItem Text="Yes" Value="True"></asp:ListItem>
                                        <asp:ListItem Text="No" Value="False"></asp:ListItem>
                                    </asp:DropDownList>
                                </div>
                            </div>
                            <!-- /.col-lg-6 (nested) -->
                        </div>
                        <asp:Button ID="btnCancel" runat="server" class="btn btn-default" Text="Cancel" PostBackUrl="~/Operations/DVO_History.aspx"
                            formnovalidate />
                        <asp:Button ID="btnSubmit_Edit" runat="server" class="btn btn-success" Text="Submit Button"
                            OnClick="btnSubmit_Edit_Click" />
                        <!-- /.row (nested) -->
                    </div>
                    </form>
                    <!-- /.panel-body -->
                </div>
                <!-- /.panel -->
            </div>
            <!-- /.col-lg-12 -->
        </div>
        <!-- /.row -->
    </div>
</asp:Content>

Edit_DVO.asx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;

namespace OperationsDepartment.Operations
{
    public partial class Edit_DVO : System.Web.UI.Page
    {
        SqlConnection con = new SqlConnection(Helper.GetCon());
        protected void Page_Load(object sender, EventArgs e)
        {
            if (Request.QueryString["ID"] != null) // record no selected
            {
                int userID = 0;
                bool validDVO_ID = int.TryParse(Request.QueryString["ID"].ToString(), out userID);

                if (validDVO_ID)
                {
                    if (!IsPostBack)
                    {
                        GetModel();
                        GetPaymentTerm();
                        GetInfo(userID);
                    }
                }
                else
                    Response.Redirect("DVO_History.aspx");
            }
            else
                Response.Redirect("DVO_History.aspx"); //change this to main homepage if meron na
        }
    
        protected void btnSubmit_Edit_Click(object sender, EventArgs e)
        {
            con.Open();
            SqlCommand com = new SqlCommand();
            com.Connection = con;
            com.CommandText = "Update DVO SET LastName=@LastName,FirstName=@FirstName,DealerName=@DealerName, " +
                "Qty=@Qty,Model=@ProductID,QuotationRefNo=@QuotationRefNo,TotalAmount=@TotalAmount, " +
                "Term=@PaymentTermID,TargetDelivery=@TargetDelivery,Status=@Status, " +
                "IsReceived=@IsReceived,IsApproved=@IsApproved, IsEvaluated=@IsEvaluated, IsProcessed=@IsProcessed WHERE DVO_ID=@DVO_ID";
            com.Parameters.AddWithValue("LastName", txtLN.Text);
            com.Parameters.AddWithValue("FirstName", txtFN.Text);
            com.Parameters.AddWithValue("DealerName", txtDN.Text);
            com.Parameters.AddWithValue("Qty", txtQ.Text);
            com.Parameters.AddWithValue("ProductID", ddlMod.SelectedValue);
            com.Parameters.AddWithValue("QuotationRefNo", txtQR.Text);
            com.Parameters.AddWithValue("TotalAmount", txtTA.Text);
            com.Parameters.AddWithValue("PaymentTermID", ddlPT.SelectedValue);
            com.Parameters.AddWithValue("TargetDelivery", txtTD.Text);
            com.Parameters.AddWithValue("Status", ddlStatus.SelectedValue);
            com.Parameters.AddWithValue("IsReceived", ddlIR.SelectedValue);
            com.Parameters.AddWithValue("IsApproved", ddlIA.SelectedValue);
            com.Parameters.AddWithValue("IsEvaluated", ddlIE.SelectedValue);
            com.Parameters.AddWithValue("IsProcessed", ddlIP.SelectedValue);
            com.Parameters.AddWithValue("DVO_ID", Request.QueryString["ID"].ToString());
            com.ExecuteNonQuery();
            con.Close();
            Response.Redirect("DVO_History.aspx");
            
        }
        void GetInfo(int ID)
        {
            con.Open();
            SqlCommand com = new SqlCommand();
            com.Connection = con;
            com.CommandText = "SELECT c.LastName, c.FirstName, dt.DealerName, " +
                "d.Qty, p.Model, d.QuotationRefNo, d.TotalAmount, pt.Term, d.TargetDelivery, d.Status " +
                "d.IsReceived, d.IsApproved, d.IsEvaluated, d.IsProcessed " +
                "FROM DVO d " +
                "INNER JOIN Dealer dt ON d.DealerID=dt.DealerID " +
                "INNER JOIN Customer c ON d.CustomerID=c.CustomerID " +
                "INNER JOIN Product p ON d.ProductID=p.ProductID " +
                "INNER JOIN PaymentTerm pt ON d.PaymentTermID=pt.PaymentTermID WHERE DVO_ID=@DVO_ID";
            com.Parameters.AddWithValue("DVO_ID", ID);
            SqlDataReader dr = com.ExecuteReader();
            if (dr.HasRows) //record existing
            {
                while (dr.Read())
                {
                    ddlMod.SelectedValue = dr["Model"].ToString();
                    ltID.Text = dr["DVO_ID"].ToString();
                    ddlStatus.SelectedValue = dr["Status"].ToString();
                    ddlPT.SelectedValue = dr["PaymentTerm"].ToString();
                    ddlIR.SelectedValue = dr["IsReceived"].ToString();
                    ddlIA.SelectedValue = dr["IsApproved"].ToString();
                    ddlIE.SelectedValue = dr["IsEvaluated"].ToString();
                    ddlIP.SelectedValue = dr["IsProcessed"].ToString();
                    txtFN.Text = dr["FirstName"].ToString();
                    txtLN.Text = dr["LastName"].ToString();
                    txtDN.Text = dr["DealerName"].ToString();
                    txtQ.Text = dr["Qty"].ToString();

                    txtQR.Text = dr["QuantityRefNo"].ToString();
                    txtTA.Text = dr["TotalAmount"].ToString();
                    txtTD.Text = dr["TargetDelivery"].ToString();


                }
                con.Close();
            }
            else // not existing
            {
                con.Close();
                Response.Redirect("DVO_History.aspx");

            }
        }


        void GetModel()
        {
            con.Open();
            SqlCommand com = new SqlCommand();
            com.Connection = con;
            com.CommandText = "SELECT ProductID, Model FROM Product";
            SqlDataReader dr = com.ExecuteReader();
            ddlMod.DataSource = dr;
            ddlMod.DataTextField = "Model";
            ddlMod.DataValueField = "ProductID";
            ddlMod.DataBind();
            con.Close();

        }


        void GetPaymentTerm()
        {
            con.Open();
            SqlCommand com = new SqlCommand();
            com.Connection = con;
            com.CommandText = "SELECT PaymentTermID, Term FROM PaymentTerm";
            SqlDataReader dr = com.ExecuteReader();
            ddlPT.DataSource = dr;
            ddlPT.DataTextField = "Term";
            ddlPT.DataValueField = "PaymentTermID";
            ddlPT.DataBind();
            con.Close();

        }




    }
}

What I have tried:

I tried using the same sql command text at my SQL Server and it works. So I do not know where the problem is coming from. I searched the meaning of my problem and it says I'm getting a null object but I know i am not getting any null object.

解决方案

A simple syntax error here:

"d.Qty, p.Model, d.QuotationRefNo, d.TotalAmount, pt.Term, d.TargetDelivery, d.Status " +
                "d.IsReceived, d.IsApproved, d.IsEvaluated, d.IsProcessed " +

You have no comma (,) after d.Status...

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