GridView标题行单击以进行排序

时间:2014-07-10 09:30:44

标签: c# asp.net gridview

我创建了一个gridview,其中有一个列有一些图像按钮来执行某些操作。与此同时,我还在标题点击上创建了排序事件。Image for gridview is enclosed in the attachment

当我点击"任务标题" Header,命令转到Grid View的RowCommand事件,我在其中检测到一个图像按钮并根据其CommandName执行操作。

但问题是我想对列进行排序,并且命令被定向到无法找到图像按钮的rowCommand。

我该如何解决这个问题?

aspx代码是:

<asp:GridView ID="TableTask" runat="server" BackColor="White" BorderColor="#CCCCCC"
        BorderStyle="None" BorderWidth="1px" CellPadding="3" AutoGenerateColumns="False"
        ViewStateMode="Enabled" Width="300px" Style="margin-left: 50px; margin-top: 50px;
        margin-bottom: 50px;" RowStyle-HorizontalAlign="Center" OnRowCommand="TableTask_RowCommand"
        OnRowCreated="TableTask_RowCreated">
        <Columns>
            <asp:TemplateField HeaderText="Task Titl`enter code here`e" SortExpression="Task_Title">
                <ItemTemplate>
                    <asp:Label ID="lblTaskName" Text='<%#BIND("Task_Title") %>' runat="server"></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText=" ">
                <ItemTemplate>
                    <asp:ImageButton ID="btnView" runat="server" CommandName="View" ImageUrl="~/Images/ViewIcon.png"
                        ToolTip="View" />&nbsp;&nbsp;
                    <asp:ImageButton ID="btnEdit" runat="server" CommandName="Change" ImageUrl="~/Images/EditIcon.png"
                        ToolTip="Edit" />&nbsp;&nbsp;
                    <asp:ImageButton ID="btnDelete" CommandArgument='<%# Eval("Task_ID") %>' runat="server"
                        CommandName="Remove" ImageUrl="~/Images/DeleteIcon.png" ToolTip="Delete" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
        <FooterStyle BackColor="White" ForeColor="#000066" />
        <HeaderStyle BackColor="Gray" Font-Bold="True" ForeColor="White" />
        <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Center" />
        <RowStyle ForeColor="#000066" />
        <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
        <SortedAscendingCellStyle BackColor="#F1F1F1" />
        <SortedAscendingHeaderStyle BackColor="#007DBB" />
        <SortedDescendingCellStyle BackColor="#CAC9C9" />
        <SortedDescendingHeaderStyle BackColor="#00547E" />
    </asp:GridView>

和RowCommand方法背后的代码定义如下:

protected void TableTask_RowCommand(object sender, GridViewCommandEventArgs e)
{
    GridViewRow gvr = (GridViewRow)((ImageButton)e.CommandSource).NamingContainer;
    int rowIndex = gvr.RowIndex;
    GridViewRow gv = TableTask.Rows[rowIndex];
    Label task_title = (Label)gv.FindControl("lblTaskName");

    if (e.CommandName == "View")
    {
        // My code    
    }

    if (e.CommandName == "Change")
    {
        // My code
    }

    if (e.CommandName == "Remove")
    {
        // My code
    }
}

当我们创建GridViewRow对象&#39; gvr&#39;时,它会出现异常。

异常是:无法转换类型为&#39; System.Web.UI.WebControls.GridView&#39;的对象输入&#39; System.Web.UI.WebControls.ImageButton&#39;。

嘿伙计!!你没有得到我...... 我说我应该怎么做才能在点击HeaderText时不要将命令转到RowCommand事件。

2 个答案:

答案 0 :(得分:1)

处理Gridview的排序事件,将允许排序属性设置为True,并将以下代码添加到 .cs文件:

    public SortDirection dir
    {
        get {
            if (ViewState["dirstate"] == null)
            {
                ViewState["dirstate"] = SortDirection.Ascending;
            }
           return (SortDirection)ViewState["dirstate"];
        }
        set {
            ViewState["dirstate"] = value;
        }
    }

    protected void grdemp_Sorting(object sender, GridViewSortEventArgs e)
    {
        BindGrid();
        string Sortdir = string.Empty;
        if (dir == SortDirection.Ascending)
        {
            dir = SortDirection.Descending;
            Sortdir = "DESC";
        }
        else
        {
            dir = SortDirection.Ascending;
            Sortdir = "ASC";
        }

        DataView dv = new DataView(dt);
        dv.Sort = e.SortExpression + " " + Sortdir;
        grdemp.DataSource = dv;
        grdemp.DataBind();


    }

答案 1 :(得分:-1)

在RowCommand事件中,您可以尝试以下代码:

  if(e.CommandName=="View")
  {
      int id=int.parse(e.CommandArgument.ToString());

  }

相同的代码写入另外两个图像按钮

感谢......