“DataList1'这个名字并不在目前的情况下存在 [英] The name 'DataList1' does not exist in the current context

问题描述

我收到以下错误页：

  

DataList1'名称''不在当前上下文中存在'

下面是我的code：

listviewvideo.aspx.cs

 私人无效BindGrid（）
{
    字符串strConnString = ConfigurationManager.ConnectionStrings [构造]的ConnectionString。
        使用（SqlConnection的CON =新的SqlConnection（strConnString））
        {
            使用（CMD的SqlCommand =新的SqlCommand（））
            {
                cmd.CommandText =选择编号，从uploadvideo名;
                cmd.Connection = CON;
                con.Open（）;
                DataList1.DataSource = cmd.ExecuteReader（）;
                DataList1.DataBind（）;
               con.Close（）;
            }
        }
    }
 

listviewvideo.aspx

 ＆LT;表＆gt;
＆所述; TR＆GT;
＆所述; TD＆GT;
    ＆LT; ASPNetFlashVideo：FlashVideo ID =FlashVideo1=服务器HEIGHT =500WIDTH =1050​​＆GT;＆LT; / ASPNetFlashVideo：FlashVideo＆GT;
    ＆LT; ASP：文件上传ID =FileUpload1=服务器的CssClass =myButton的/＆GT;
    ＆LT; ASP：按钮的ID =btnupload=服务器文本=上传的OnClick =btnupload_Click的CssClass =myButton的/＆GT;
    ＆LT;小时/＆GT;
    ＆LT; ASP：DataList控件ID =DataList1可见=真=服务器的AutoGenerateColumns =false的RepeatColumns =2CELLSPACING =5＆GT;
    ＆LT;＆ItemTemplate中GT;
    ＆LT; U＆GT;
    ＆LT;％＃的eval（姓名）％＆GT;
    ＆LT; / U＆GT;
    ＆LT;一类=播放器的风格=高度：300像素;宽度：300像素，显示：块的href ='＆LT;％＃的eval（ID，FileCS.ashx ID = {0}？）％＆GT ;'＆GT;＆下; / A＆GT;
    ＆LT; / ItemTemplate中＆GT;
    ＆LT; / ASP：DataList控件＆GT;
＆LT; / TD＆GT;
＆LT; / TR＆GT;
＆LT; /表＆gt;
 

我收到以下错误页：

  

DataList1'名称''不在当前上下文中存在'

解决方案

您可能会得到这个错误。有这3解决方案

• 
  
  1. 保存项目，并关闭该解决方案，关闭 IIS防爆preSS 也。并检查它是否有效与否。
  
  


• 
  
• 尝试通过在其中添加你的 listviewvideo.aspx.designer.cs 页写低于code添加在DataList的 DataList控件项目。



• 
  
• 检查隐藏文件名，并在 @Page 指令继承财产的code，确保它们都匹配。

您也可以看看这里的更多清晰的图片。

ID不存在于当前上下文

\r

\r

保护全球:: System.Web.UI.WebControls.DataList Datalist1;

\r

\r

\r

希望这有助于。

I get the following error in a page:

'The name 'DataList1' does not exist in the current context'

Here is my code:

listviewvideo.aspx.cs

private void BindGrid()
{
    string strConnString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(strConnString))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.CommandText = "select Id, Name from uploadvideo";
                cmd.Connection = con;
                con.Open();
                DataList1.DataSource = cmd.ExecuteReader();
                DataList1.DataBind();
               con.Close();
            }
        }
    }

listviewvideo.aspx

<table>
<tr>
<td>
    <ASPNetFlashVideo:FlashVideo ID="FlashVideo1" runat="server" Height="500" Width="1050"></ASPNetFlashVideo:FlashVideo>
    <asp:FileUpload ID="FileUpload1" runat="server" CssClass="myButton" />
    <asp:Button ID="btnupload" runat="server" Text="Upload" OnClick="btnupload_Click" CssClass="myButton" />
    <hr />
    <asp:DataList ID="DataList1" Visible="true" runat="server" AutoGenerateColumns="false" RepeatColumns="2" CellSpacing="5">
    <ItemTemplate>
    <u>
    <%# Eval("Name") %>
    </u>
    <a class="player" style="height:300px; width:300px; display:block" href='<%# Eval("Id","FileCS.ashx?Id={0}") %>'></a>
    </ItemTemplate>
    </asp:DataList>
</td>
</tr>
</table>

I get the following error in a page:

'The name 'DataList1' does not exist in the current context'

解决方案

You might get this error. There 3 solutions for this

• 1. Save your project and close the Solution, close the IIS Express also. And check whether it works or not.

• 2. Try adding the the datalist by writing below code in your listviewvideo.aspx.designer.cs page of where you are adding the Datalist item.

• 3. Check your code behind file name and Inherits property on the @Page directive, make sure they both match.

Also you can have a look here for more clear picture

ID Does not exist in the current context

protected global::System.Web.UI.WebControls.DataList Datalist1;

Hope this helps.

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