Question

我有一個表使用中繼器來顯示數據。在每一行上都有一個'刪除'按鈕，點擊後會從選定的行中檢索'ClassId'，該行將用於SQL DELETE查詢。

我不知道如何從所選行中獲取'ClassId'。從中繼

代碼片段：的.cs頁

<ItemTemplate> 
<tr> 

    <td> 
    <asp:Label runat="server" ID="LblTitle"Text='<%# Eval("ClassId")%>' /> 
    </td> 

    <td> 
    <asp:Label runat="server" ID="LblEmail" Text='<%# Eval("StartTime")%>' /> 
    </td> 

    <td> 
     <asp:Label runat="server" ID="Label4" Text='<%# Eval("EndTime")%>' /> 
    </td> 

    <td> 
    <asp:Label runat="server" ID="Label1" Text='<%# Eval("ClassDate")%>' /> 
    </td> 

    <td> 
    <asp:Label runat="server" ID="Label2" Text='<%# Eval("BuildingName")%>' /> 
    </td> 

    <td> 
    <asp:Label runat="server" ID="Label3" Text='<%# Eval("RoomCode")%>' /> 
    </td> 

    <td> 
    <asp:Button ID="deleteBtn" runat="server" OnClick="deleteBtn_Click" class="btn btn-danger" 
    CommandArgument='<%# Eval("ClassId") %>'Text="Delete" /> 
    </td> 

</tr> 
</ItemTemplate> 

代碼：

protected void deleteBtn_Click(object sender, EventArgs e) 
{ 
    //SQL Delete query goes here using the ClassId to delete the row 
} 

Answer 1

你傳遞的classid在CommandArgument，從那裏得到它。

protected void deleteBtn_Click(object sender, EventArgs e) 
{ 
    //SQL Delete query goes here using the ClassId to delete the row 
    var classid = ((Button)sender).CommandArgument; 
}