水印添加到图像并保存数据库c＃（winform） [英] Watermark add to image and save database c# (winform)

问题描述

如何将水印[text]添加到图像和存储到sql server的图像（C＃winform）？



此致，

Karthikeyan，

Bangalore。

解决方案

查看这些CP文章

使用GDI + for .NET创建带水印的照片 [ ^ ]

如何在C＃ASP.NET中创建水印图像？ [ ^ ]

以下代码将使用C＃在图像上创建水印。 
 
 
 
 //使用System.Drawing使用NameSpace 
; 
 
 
 
 //在活动中执行以下代码，你想要水印。 
 {
 //创建Image的位图对象，这里我从文件控件FileTest中获取图像
位图bmp = new Bitmap（FileTest.PostedFile.InputStream）; 
 Graphics canvas = Graphics.FromImage（bmp）; 
 try 
 {
 Bitmap bmpNew = new Bitmap（bmp.Width，bmp.Height）; 
 canvas = Graphics.FromImage（bmpNew）; 
 canvas.DrawImage（bmp，new Rectangle（0,0，
 bmpNew.Width，bmpNew.Height），0,0，bmp.Width，bmp.Height，
 GraphicsUnit.Pixel） ; 
 bmp = bmpNew; 
} 
 catch（例外ee）//捕获异常
 {
 Response.Write（ee.Message）; 
} 
 //这里用文本替换文本，你也可以分配字体系列，颜色，文本位置等。
 canvas.DrawString（Text，new Font（ Verdana，14，
 FontStyle.Bold），新的SolidBrush（Color.Beige），（bmp.Width / 2），
（bmp.Height / 2））; 
 //保存或显示所需的图像。 
 bmp.Save（System.Web.HttpContext.Current.Server.MapPath（〜/ 
 WaterMarkImages /）+ 
 FileTest.PostedFile.FileName，
 System.Drawing。 Imaging.ImageFormat.Jpeg）; 
} 

用于插入图像到DB

参考以下链接

存储和检索来自SQL Server的图像使用标记过程和C＃.net [ ^ ]

此代码将您的图像转换为适当的格式，您可以将图像保存到您的数据库。

 private void btnBrowse_Click（object sender，EventArgs e）
 {
 
 OpenFileDialog openFileDialog1 = new OpenFileDialog （）; 
 
 openFileDialog1.InitialDirectory = @C：\; 
 openFileDialog1.Title =选择Ur图像文件; 
 
 openFileDialog1.Filter =所有文件（*。*）| *。*; 
 openFileDialog1.FilterIndex = 2; 
 openFileDialog1.RestoreDirectory = true; 
 
 openFileDialog1.ReadOnlyChecked = true; 
 openFileDialog1.ShowReadOnly = true; 
 
 if（openFileDialog1.ShowDialog（）== DialogResult.OK）
 {
 tbUpload.Text = openFileDialog1.SafeFileName; 
 string FilePath; 
 FilePath = openFileDialog1.FileName; 
 if（openFileDialog1.FileName！= null）
 {
 
 System.IO.FileStream fs = new System.IO.FileStream（FilePath，System.IO.FileMode.Open， System.IO.FileAccess.ReadWrite）; 
 System.IO.BinaryReader binaryReader = new System.IO.BinaryReader（fs）; 
 long byteLength = new System.IO.FileInfo（FilePath）.Length; 
 byte [] Attachmnt; 
 Attachmnt = binaryReader.ReadBytes（（Int32）byteLength）; 
 fs.Close（）; 
 fs.Dispose（）; 
 binaryReader.Close（）; 
} 
} 
 
} 

现在你可以通过storedprocedure或查询将{Attachmnt}的值存储到你的数据库中。（但你想要放置你的图像的列（Attachmnt）应该是iamge类型）



在这里，我通过浏览按钮通过openfiledialog解释它，你将选择你的图像。



但我不知道通过程序加水印。

Hi,
How to add watermark [text] to image and that image stored to sql server (C# winform)?

Regards,
Karthikeyan,
Bangalore.

解决方案

Check these CP articles
Creating a Watermarked Photograph with GDI+ for .NET[^]
How to Create watermarked images in C# ASP.NET ?[^]

The below code will create a watermark on image using C#.
 


//Use NameSpace
using System.Drawing;

 

//Execute below code at the event, where u wants Water Marking. 
{ 
           // Create a bitmap object of the Image, Here I am taking image from File Control "FileTest" 
            Bitmap bmp = new Bitmap(FileTest.PostedFile.InputStream); 
            Graphics canvas = Graphics.FromImage(bmp); 
            try 
            { 
                Bitmap bmpNew = new Bitmap(bmp.Width, bmp.Height); 
                canvas = Graphics.FromImage(bmpNew); 
                canvas.DrawImage(bmp, new Rectangle(0, 0, 
bmpNew.Width, bmpNew.Height), 0, 0, bmp.Width, bmp.Height, 
GraphicsUnit.Pixel); 
                bmp = bmpNew; 
            } 
            catch(Exception ee) // Catch exceptions 
            { 
                Response.Write(ee.Message); 
            } 
            // Here replace "Text" with your text and you also can assign Font Family, Color, Position Of Text etc. 
            canvas.DrawString("Text", new Font("Verdana", 14, 
FontStyle.Bold), new SolidBrush(Color.Beige), (bmp.Width / 2), 
(bmp.Height / 2)); 
            // Save or display the image where you want. 
            bmp.Save(System.Web.HttpContext.Current.Server.MapPath("~/ 
WaterMarkImages/") + 
FileTest.PostedFile.FileName, 
System.Drawing.Imaging.ImageFormat.Jpeg); 
} 

For insert image to DB
refer the following link
Storing and Retrieving Images from SQL Server Using Strored Procedures and C#.net[^]

This code will convert ur image to proper format by which u can save ur image to ur database.

private void btnBrowse_Click(object sender, EventArgs e)
        {   
            
                OpenFileDialog openFileDialog1 = new OpenFileDialog();

                openFileDialog1.InitialDirectory = @"C:\";
                openFileDialog1.Title = "Select Ur Image File";
                
                openFileDialog1.Filter = "All Files (*.*)|*.*";
                openFileDialog1.FilterIndex = 2;
                openFileDialog1.RestoreDirectory = true;

                openFileDialog1.ReadOnlyChecked = true;
                openFileDialog1.ShowReadOnly = true;
             
                if (openFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    tbUpload.Text = openFileDialog1.SafeFileName;
string FilePath;
                    FilePath = openFileDialog1.FileName;
                    if (openFileDialog1.FileName != null)    
                    {
                        
System.IO.FileStream fs = new System.IO.FileStream(FilePath, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite);
                        System.IO.BinaryReader binaryReader = new System.IO.BinaryReader(fs);
                        long byteLength = new System.IO.FileInfo(FilePath).Length;
byte[] Attachmnt;
                        Attachmnt = binaryReader.ReadBytes((Int32)byteLength);
                        fs.Close();
                        fs.Dispose();
                        binaryReader.Close();
                    }                    
                }
               
             }      

Now u can store the value of {Attachmnt} through storedprocedure or query into ur database.(But the column where u want to put ur image (Attachmnt) should be type "iamge")

Here i explained it throuth openfiledialog by Browse button,where u will select ur image.

But i have no idea about watermarking through program.

这篇关于水印添加到图像并保存数据库c＃（winform）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！