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Question

填寫錯誤我真的努力了很多知道哪裏是錯這個下面的代碼，展示給我的錯誤信息：

「填寫：selectcommand.connection屬性尚未初始化」

click to see the error image 但我不能真正得到錯誤變成下面的代碼，請你能不能幫我解決這個代碼，並避免出現此錯誤消息

protected void addadsbtn_Click(object sender, EventArgs e) 
    { 

     HttpCookie cookie = Request.Cookies.Get("Location"); 
     string Location = string.Empty; 

     var user = Session["UsrNme"]; 
     Location = cookie.Value; 

     string FileExtentio = System.IO.Path.GetExtension(FileUploadImg1.FileName); 
     string FileExtentio2 = System.IO.Path.GetExtension(FileUploadImg2.FileName); 

     string makervalue = string.Empty; 

     string Gearvalue = string.Empty; 

     string NyAdsDesc = TextBox2.Text; 

     SqlConnection addadscon = new SqlConnection(sc); 

     var UsrNme = Session["UsrNme"]; 



     if (Session["UsrNme"] != null && cookie != null) 
     { 

      } 


      if (FileUploadImg1.HasFile || FileUploadImg2.HasFile || FileUploadImg3.HasFile || FileUploadImg4.HasFile || FileUploadImg5.HasFile) 
      { 

       var filess = new[] { FileExtentio, FileExtentio2, FileExtentio3, FileExtentio4, FileExtentio5 }; 
       filess = filess.Where(s => !string.IsNullOrEmpty(s)).ToArray(); 
       var extensions = new[] { ".jpg", ".png" }; 
       if ((filess.Except(extensions).Count()) <= 0) 
       { 

        if (DropDownList3.SelectedValue == "no") 
        { 
         AdsWrngPanel.Visible = true; 
         adsstutslbel.Text = "- Please select ads status"; 
        } 
        else 
        { 

        } 


        if (DropDownList2.SelectedValue == "no") 
        { 
         AdsWrngPanel.Visible = true; 
         adscondlbel.Text = "- Please select ads condition"; 
        } 
        else 
        { 

        } 



        SqlCommand cmd = new SqlCommand(@"INSERT INTO [ads] ([Section], [Category], [UID], [AdsTit], [AdsDesc], [Country], [State],[AdsDate], 
     [City], [AdsPrice], [Img1], [img2], [img3], [img4],[img5], [Wtags], [Address],[Condition], [Status],[Maker],[Year],[Gear],[RoomNo], 
     [Space],[Shower],[Garage],[Currency]) 
     VALUES (@Section, @Category, @UID, @AdsTit, @AdsDesc, @Country, @State,@adsDate, @City, @AdsPrice, @Img1, @img2, @img3, 
     @img4, @img5, @Wtags, @Address,@Condition, @Status,@Maker,@Year,@Gear,@RoomNo,@Space,@Shower,@Garage,@Currency)", addadscon); 


        cmd.Parameters.AddWithValue("@Section", Secdrdoads.SelectedItem.Text); 
        cmd.Parameters.AddWithValue("@Maker", makervalue); 
        cmd.Parameters.AddWithValue("@Year", Yearvalue); 

        string imgnouser = "/images/general/nouser.jpg"; 

        if (FileUploadImg1.HasFile) 
        { 
         cmd.Parameters.AddWithValue("@Img1", FileUploadImg1.FileName); 
         FileUploadImg1.SaveAs(Server.MapPath("~/images/AdsImgs/" + FileUploadImg1.FileName)); 
        } 
        else 
        { 
         cmd.Parameters.AddWithValue("@Img1", imgnouser); 
        } 


        addadscon.Open(); 
        cmd.ExecuteNonQuery(); 
        addadscon.Close(); 

       } 

       else 
       { 
        AddNwAddsWrngFrmtLbl.Text = "Error: The file should have .png or .jpg format only"; 
        AddNwAddsWrngFrmtLbl.ForeColor = System.Drawing.Color.Red; 


       } 



      } 

      else 
      { 
       SqlCommand cmd3 = new SqlCommand(@"INSERT INTO [ads] ([Section], [Category], [UID], [AdsTit], [AdsDesc], [Country], [State],[AdsDate], 
     [City], [AdsPrice], [Wtags], [Address],[Condition], [Status],[Maker],[Year],[Gear],[RoomNo], [Space],[Shower],[Garage]) 
     VALUES (@Section, @Category, @UID, @AdsTit, @AdsDesc, @Country, @State,@adsDate, @City, @AdsPrice, @Wtags, @Address,@Condition, @Status,@Maker,@Year,@Gear,@RoomNo,@Space,@Shower,@Garage)", addadscon); 


       cmd3.Parameters.AddWithValue("@Wtags", addadswtagtxtbtn.Text); 
       cmd3.Parameters.AddWithValue("@Condition", DropDownList2.SelectedItem.Text); 
       cmd3.Parameters.AddWithValue("@Status", DropDownList3.SelectedItem.Text); 
       cmd3.Parameters.AddWithValue("@adsDate", DateTime.Now); 


       addadscon.Open(); 
       cmd3.ExecuteNonQuery(); 
       addadscon.Close(); 

      } 


      MultiView1.ActiveViewIndex = 3; 
      ViwMyAdsPanel.Visible = true; 

      CheckUsrAds(); 


     } 


    } 

Answer 1

進一步的意見，並根據您發佈的例外截圖，我認爲這個問題是由以下事件而產生：

beravoSV.User_panel.adNewdadsbtn_Click(...)

所以這個事件（包括由該事件稱爲方法）檢查​​DataAdapter內相關的代碼。對於e.g：

SqlDataAdapter adapter = new SqlDataAdapter(queryString, connection);

，並確保適當的connection是越來越傳遞到DataAdapter的實例。

我認爲應該解決這個問題。