asp. net image upload example
- 2020-10-31 21:43:18
- OfStack
1. Picture upload, the code is as follows:
xxx.aspx
<td class="style1">
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text=" upload 1 Like the picture " onclick="Button1_Click" />
</td>
<td class="style3">
<asp:Image ID="Image1" runat="server" Height="200px" Width="200px" />
</td>
xxx.aspx.cs
protected void Button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < Request.Files.Count; i++)
{
HttpPostedFile file = Request.Files[i];
if (file.ContentLength > 0)
{
if (file.ContentType.Contains("image/"))
{
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
string FileName = System.IO.Path.GetFileName(file.FileName);
string[] SplitFileName = FileName.Split('.');
string AtterFileName = DateTime.Now.ToString("yyyMMddHHmmss")+"." + SplitFileName[1];
img.Save(Server.MapPath("/upload/" + AtterFileName));
this.Image1.ImageUrl = "upload/" + AtterFileName;
}
}
else
{
Response.Write("<script>alert(' This file is not in image format! ');</script>");
}
}
else
{
Response.Write("<script>alert(' Please select the image to upload ');</script>");
}
}
}
2. Upload images with text watermark, the code is as follows:
xxx.aspx
<td class="style1">
<asp:FileUpload ID="FileUpload2" runat="server" />
<asp:Button ID="Button2" runat="server" Text=" Upload text picture " onclick="Button2_Click" />
</td>
<td>
<asp:Image ID="Image2" runat="server" Height="200px" Width="200px" />
</td>
xxx.aspx.cs
protected void Button2_Click(object sender, EventArgs e)
{
for (int i = 0; i < Request.Files.Count; i++)
{
HttpPostedFile file = Request.Files[i];
if (file.ContentLength > 0)
{
if (file.ContentType.Contains("image/"))
{
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
using (Graphics g = Graphics.FromImage(img))
{
g.DrawString(" My pictures ", new Font(" Song typeface ", 14), Brushes.Red, 0, 0);
}
string FileName = System.IO.Path.GetFileName(file.FileName);
string[] SplitFileName = FileName.Split('.');
string AtterFileName = DateTime.Now.ToString("yyyMMddHHmmss") + "." + SplitFileName[1];
img.Save(Server.MapPath("/upload/" + AtterFileName));
this.Image2.ImageUrl = "upload/" + AtterFileName;
}
}
else
{
Response.Write("<script>alert(' This file is not in image format! ');</script>");
}
}
else
{
Response.Write("<script>alert(' Please select the image to upload ');</script>");
}
}
}
3. Upload the watermark image, the code is as follows:
xxx.aspx
<td class="style1">
<asp:FileUpload ID="FileUpload3" runat="server" />
<asp:Button ID="Button3" runat="server" Text=" Upload watermark image " onclick="Button3_Click" />
</td>
<td>
<asp:Image ID="Image3" runat="server" Height="200px" Width="200px" />
</td>
xxx.aspx.cs
protected void Button3_Click(object sender, EventArgs e)
{
for (int i = 0; i < Request.Files.Count; i++)
{
HttpPostedFile file = Request.Files[i];
if (file.ContentLength > 0)
{
if (file.ContentType.Contains("image/"))
{
string fileName = file.FileName;
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
using (System.Drawing.Image imgWater = System.Drawing.Image.FromFile(Server.MapPath("/img/czlogo.jpg")))
{
using (Graphics g = Graphics.FromImage(img))
{
g.DrawImage(imgWater, 0, 0);
}
string[] SplitFileName = fileName.Split('.');
string AtterFileName = DateTime.Now.ToString("yyyMMddHHmmss") + "." + SplitFileName[1];
img.Save(Server.MapPath("/upload/" + AtterFileName));
this.Image3.ImageUrl = "upload/" + AtterFileName;
}
}
}
else
{
Response.Write("<script>alert(' This file is not in image format! ');</script>");
}
}
else
{
Response.Write("<script>alert(' Please select the image to upload ');</script>");
}
}
}
4. Upload the condensed picture, the code is as follows:
xxx.aspx
<td class="style1">
<asp:FileUpload ID="FileUpload4" runat="server" />
<asp:Button ID="Button4" runat="server" Text=" Upload condensed images " onclick="Button4_Click" />
</td>
<td>
<asp:Image ID="Image4" runat="server" Height="200px" Width="200px" />
</td>
xxx.aspx.cs
protected void Button4_Click(object sender, EventArgs e)
{
for (int i = 0; i < Request.Files.Count; i++)
{
HttpPostedFile file = Request.Files[i];
if (file.ContentLength > 0)
{
if (file.ContentType.Contains("image/"))
{
using (System.Drawing.Image img = System.Drawing.Image.FromStream(file.InputStream))
{
using (System.Drawing.Image imgThumb = new Bitmap(200, 100))
{
using (Graphics g = Graphics.FromImage(imgThumb))
{
g.DrawImage(img, new Rectangle(0, 0, imgThumb.Width, imgThumb.Height), new Rectangle(0, 0, img.Width, img.Height), GraphicsUnit.Pixel);
}
string fileName = file.FileName;
string[] SplitFileName = fileName.Split('.');
string AtterFileName = DateTime.Now.ToString("yyyMMddHHmmss") + "." + SplitFileName[1];
img.Save(Server.MapPath("/upload/" + AtterFileName));
this.Image4.ImageUrl = "upload/" + AtterFileName;
}
}
}
else
{
Response.Write("<script>alert(' This file is not in image format! ');</script>");
}
}
else
{
Response.Write("<script>alert(' Please select the image to upload ');</script>");
}
}
}