如何在asp.net c＃中的gridview中显示二进制图像 [英] how to display binary images in gridview in asp.net c#

问题描述

请帮助我如何在asp.net C中向二进制图像显示数据库到gridview＃



i我按照商店程序显示数据。

kindly help me that how to show to binary images form database to gridview in asp.net C#

i am showing data with images by store procedure.

public void FillGrid()
      {
          DataSet ds = ExamQuestionClass.FillGridQuestion(ddSubjectList.SelectedValue, int.Parse(ddsubjTopic.SelectedValue), ddQType.Text, int.Parse(ddSectionList.SelectedValue), ddSessionList.SelectedValue);
          //byte[] imagedata = null;
          //foreach (DataRow row in ds.Tables[0].Rows)
          //{
          //    imagedata = (byte[])row["Q_Image"];


          //    string base64String1 = Convert.ToBase64String(imagedata, 0, imagedata.Length);
          //    Image2.ImageUrl = "data:image/png;base64," + base64String1;
          //}
          GVQuestion.DataSource = ds.Tables[0];
        //  GVQuestion.DataSource = image.ImageUrl;
          GVQuestion.DataBind();
      }

推荐答案

使用模板字段包含将显示图像的图像控件...

https://msdn.microsoft.com/en-us/library/aa479350.aspx [ ^ ]

Use template field to include image control that will display the image...
https://msdn.microsoft.com/en-us/library/aa479350.aspx[^]

public string GetImage(object img)
       {
           return "data:image/jpg;base64," + Convert.ToBase64String((byte[])img);
       }

< asp：gridview id =GVQuestionrunat =server autogeneratecolumns =Falsexmlns：asp =＃unknown>

onselectedindexchanged =GVQuestion_SelectedIndexChanged>

< columns>





< asp：templatefield headertext =Image>

< edititemtemplate>

< asp：textbox id =TextBox1runat =servertext =<％＃Eval（q_image）=％& gt;=>



< itemtemplate>

< asp：image id =Image3runat =server>

ImageUrl ='<％＃GetImage（Eval（Q_Image））％>'宽度=200px/>









这是解决了在asp.net中在gridview中显示图像的代码很简单



for the help help转到此链接将byte []自动绑定到asp：图片 [ ^ ]

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