增加的GridView标题图片（ASC / DESC）的onload [英] adding gridview header image(asc/desc) onload

问题描述

我有正常工作的过滤/排序功能的GridView。我的问题是的onload，它并不显示递增/递减图像我的报头之后。排序图像只有点击任何头后显示。任何帮助将是AP preciated。

codebehind：

 ＃地区的排序箭的GridView头
保护无效GridView1_RowCreated（对象发件人，GridViewRowEventArgs E）
{
    如果（e.Row.RowType == DataControlRowType.Header）
    {
        的foreach（在e.Row.Cells TableCell的TC）
        {
            //搜索标题链接
            LinkBut​​ton的LNK =（LinkBut​​ton的）tc.Controls [0];
            如果（tc.HasControls（）及和放大器; LNK = NULL＆放大器;！＆安培; GridView1.SortEx pression == lnk.CommandArgument）
            {
                // inizialize新形象
                System.Web.UI.WebControls.Image IMG =新System.Web.UI.WebControls.Image（）;
                //设置图像的动态网址
                img.ImageUrl =〜/内容/图片/+（GridView1.SortDirection == SortDirection.AscendingASC：降序）+巴纽;
                //添加空间和图象的头的链接
                tc.Controls.Add（新LiteralControl（））;
                tc.Controls.Add（IMG）;
                //
            }
        }
    }
}
#endregion
 

解决方案

我只是想通了。

 保护无效的Page_Load（对象发件人，EventArgs的发送）
{
    如果（！Page.IsPostBack）
    {
        图片IMG =新的图像（）;
        img.ImageUrl =〜/内容/图像/ asc.png
        GridView1.HeaderRow.Cells [1] .Controls.Add（新LiteralControl（））;
        GridView1.HeaderRow.Cells [1] .Controls.Add（IMG）;
    }
}
 

谢谢..

I have a gridview with filtering/sorting functions working properly. My problem is that onload, it does not show asc/desc image right after my header. Sorting image shows only after clicking any header. Any help would be appreciated.

Codebehind:

#region Sorting Arrows for Gridview Header
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        foreach (TableCell tc in e.Row.Cells)
        {
            // search for the header link
            LinkButton lnk = (LinkButton)tc.Controls[0];
            if (tc.HasControls() && lnk != null && GridView1.SortExpression == lnk.CommandArgument)
            {
                // inizialize a new image
                System.Web.UI.WebControls.Image img = new System.Web.UI.WebControls.Image();
                // setting the dynamically URL of the image
                img.ImageUrl = "~/Contents/Images/" + (GridView1.SortDirection == SortDirection.Ascending ? "asc" : "desc") + ".png";
                // adding a space and the image to the header link
                tc.Controls.Add(new LiteralControl(" "));
                tc.Controls.Add(img);
                //
            }
        }
    }
}
#endregion

解决方案

I just figured it out..

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {       
        Image img = new Image();
        img.ImageUrl = "~/Contents/Images/asc.png";
        GridView1.HeaderRow.Cells[1].Controls.Add(new LiteralControl(" "));
        GridView1.HeaderRow.Cells[1].Controls.Add(img);
    }
}

Thanks..

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