在ASP.Net网格视图中显示Base64字符串

string base64String = "Your Base64 String";
byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(imageBytes);
Image image = Image.FromStream(ms);

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField HeaderText="Image">
            <ItemTemplate>
                <asp:Image ID="Image1" runat="server" ImageUrl='<%# Eval("ImageUrl") %>' />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("ImageUrl");

        // Add image URL to the DataTable
        DataRow row = dt.NewRow();
        row["ImageUrl"] = "data:image/png;base64," + base64String; // Replace base64String with your actual Base64 string
        dt.Rows.Add(row);

        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}