Question

我想在 sqlite 数据库中以 xamarin 形式存储图片路径，以用于跨平台应用程序。如何存储图像的路径？

Answer 1

以下是我在sqlite中保存图像所做的工作。我在成功保存图像时返回图像的路径，您可以根据需要更改它。这里图像以字节数组的形式存储。

链接到我的博文：Cross platform utility to save image in sqlite.

Comman界面：

 public interface IFileUtility
        {
            /// <summary>
            /// Use to save file in device specific folders
            /// </summary>
            /// <param name="fileName"></param>
            /// <param name="fileStream"></param>
            /// <returns></returns>
            string SaveFile(string fileName,byte[] fileStream);

            /// <summary>
            /// Used to delete the existing file directory, before syncing the file again.
            /// </summary>
            void DeleteDirectory();

        }

Android特定代码：

public class FileUtility : IFileUtility
    {
        public string SaveFile(string fileName,byte[] imageStream)
        {
            string path = null;
            string imageFolderPath = System.IO.Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.Personal), "ProductImages");

            //Check if the folder exist or not
            if (!System.IO.Directory.Exists(imageFolderPath))
            {
                System.IO.Directory.CreateDirectory(imageFolderPath);
            }
            string imagefilePath = System.IO.Path.Combine(imageFolderPath, fileName);

            //Try to write the file bytes to the specified location.
            try
            {
                System.IO.File.WriteAllBytes(imagefilePath, imageStream);
                path = imagefilePath;
            }
            catch (System.Exception e)
            {
                throw e;
            }
            return path;
        }

        public void DeleteDirectory()
        {
            string imageFolderPath = System.IO.Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.Personal), "ProductImages");
            if (System.IO.Directory.Exists(imageFolderPath))
            {
                System.IO.Directory.Delete(imageFolderPath,true);
            }
        }
    }

iOS特定代码：

 public class FileUtility : IFileUtility
    {
        public string SaveFile(string fileName,byte[] fileStream)
        {
            string path = null;
            string imageFolderPath = System.IO.Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.Personal), "ProductImages");

            //Check if the folder exist or not
            if (!System.IO.Directory.Exists(imageFolderPath))
            {
                System.IO.Directory.CreateDirectory(imageFolderPath);
            }
            string imagefilePath = System.IO.Path.Combine(imageFolderPath, fileName);

            //Try to write the file bytes to the specified location.
            try
            {
                System.IO.File.WriteAllBytes(imagefilePath, fileStream);
                path = imagefilePath;
            }
            catch (System.Exception e)
            {
                throw e;
            }
            return path;
        }

        public void DeleteDirectory()
        {
            string imageFolderPath = System.IO.Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.Personal), "ProductImages");
            if (System.IO.Directory.Exists(imageFolderPath))
            {
                System.IO.Directory.Delete(imageFolderPath,true);
            }
        }
    }

Answer 2

这个问题是重复的 Is it possible to store images in xamarin sqlite

可能 How to store image in SQLite database可以帮助您。

如何在Xamarin Forms中的sqlite数据库中存储图像以用于跨平台应用程序？

2 个答案: