在gridview中显示默认图像 [英] Displaying a default image in gridview

问题描述

  if（fileUpload.PostedFile == null）
 {
 lblStatus.Text =没有指定文件。; 
 return; 
} 
 else 
 {
 {
  

解决方案

一种方法可能是在RowDataBound事件期间检查每一行以查看图像是否存在。如果它是空的，你可以指定一个默认的图片url。

pre $ protected $ GridView1_RowDataBound（object sender，GridViewRowEventArgs e）
（
if（e.RowType == DataControlRowType.DataRow）
{
Image image =（Image）e.Row.FindControl（ImageForPerson）;

if（image！= null& image.ImageIrl ==）
{
image.ImageUrl = //默认图片网址在这里
}
}
}

不要忘记将RowDataBound事件添加到GridView

 < asp：GridView ID =GridView1OnRowDataBound =GridView1_RowDataBound/> 
  

---

或者如果您不想使用RowDataBound事件。在Page_Load中，您可以手动检查GridView的每一行并逐个检查ImageUrl。

  protected void Page_Load（object sender，EventArgs e）
 {
 foreach（GridViewRow gvr in GridView1.Rows）
 {
 Image image =（Image）gvr.FindControl（ImageForPerson）; 
 
 if（image！= null& image.ImageIrl ==）
 {
 image.ImageUrl = //默认图片网址在这里
 } 
} 
} 
  

How to display a defualt profile image in gridview if user didn't provided any image.

if (fileUpload.PostedFile == null) 
{ 
    lblStatus.Text = "No file specified."; 
    return; 
} 
else
{        
{

解决方案

One approach might be to check each row during RowDataBound event to see image exists or not. If it is empty, you can assign a default image url.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{        
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
        Image image= (Image)e.Row.FindControl("ImageForPerson");

        if (image != null && image.ImageIrl == "")
        {
            image.ImageUrl = // default image url goes here
        }
    }
}

Do not forget to add RowDataBound event to your GridView definition.

<asp:GridView ID="GridView1" OnRowDataBound="GridView1_RowDataBound" />

---

Or If you do not want to use RowDataBound event. At Page_Load you can manually go through each Row of GridView and check ImageUrl one by one.

protected void Page_Load(object sender, EventArgs e)
{
     foreach(GridViewRow gvr in GridView1.Rows)
     {
         Image image = (Image)gvr.FindControl("ImageForPerson");

         if (image != null && image.ImageIrl == "")
         {
             image.ImageUrl = // default image url goes here
         }
     }
}

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