asp.net 将sqlserver中的二进制照片显示到image控件中
时间: 2024-05-10 15:17:19 浏览: 130
显示二进制存储的图片控件
在ASP.NET中将SQL Server中的二进制照片显示在Image控件中,可以按照以下步骤进行:
1. 从数据库中检索二进制图像数据并将其存储在byte数组中:
```csharp
byte[] imageData = null;
string connectionString = "Data Source=yourServerName;Initial Catalog=yourDatabaseName;Integrated Security=True";
string query = "SELECT imageColumn FROM yourTableName WHERE id = yourRecordId";
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand(query, connection);
connection.Open();
using (SqlDataReader reader = command.ExecuteReader())
{
if (reader.Read())
{
imageData = (byte[])reader["imageColumn"];
}
}
}
```
2. 将byte数组转换为Base64字符串:
```csharp
string base64String = Convert.ToBase64String(imageData);
```
3. 在Image控件中设置Base64字符串作为其源:
```html
<asp:Image ID="imageControl" runat="server" />
```
```csharp
imageControl.ImageUrl = "data:image/png;base64," + base64String;
```
其中,"data:image/png;base64,"后面的部分应该根据实际的图像格式进行更改。
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