使用C＃

Question

我正在尝试使用C＃从SQL服务器检索图像，方法是单击Windows窗体中的SHOW按钮并将其显示在Windows窗体的PictureBox中（在Visual Studio 2010中）。下面的代码给出了“内存不足”的错误。在使用调试器时，可以看到barrImg获取了正确的值，但仍然没有显示图像。

namespace try1
{
public partial class Form1 : Form
{
    SqlConnection conS;
    SqlCommand cmdS;
    SqlDataAdapter dataadapS;
    string constr = "Data Source=______,_____;Network Library=__________;Initial Catalog=___________;User Id=___________;Password=__________";
    public Form1()
    {
        InitializeComponent();
    }

    private void btn_show_Click(object sender, EventArgs e)
    {
        string sql = "select col1 from table1 where condition1";
        conS = new SqlConnection(constr);
        try
        {
            byte[] outbyte_LP1 = null;
            DataSet gD = new DataSet();
            conS.Open();
            cmdS = new SqlCommand(sql, conS);
            dataadapS = new SqlDataAdapter(cmdS);
            dataadapS.Fill(gD, "gd");
            if (gD.Tables["gd"].Rows.Count > 0)
            {
                //string strfn = Convert.ToString(DateTime.Now.ToFileTime());
                //FileStream FS = new FileStream(strfn, FileMode.Create);
                //byte[] blob = (byte[])gD.Tables["gd"].Rows[0]["col1"];
                //FS.Write(blob, 0, blob.Length);
                //FS.Close();
                //FS = null;
                //pctimg1.Image = Image.FromFile(strfn);
                //byte[] barrImg = (byte[])cmdS.ExecuteScalar();
                //string strfn = Convert.ToString(DateTime.Now.ToFileTime());
                //FileStream fs = new FileStream(strfn, FileMode.CreateNew, FileAccess.Write);
                //fs.Write(barrImg, 0, barrImg.Length);
                //fs.Flush();
                //fs.Close();
                //pctimg1.Image = Image.FromFile(strfn);

                DateTime actDate = (DateTime)gD.Tables["gd"].Rows[0]["DateTime"];
                outbyte_LP1 = (byte[])gD.Tables["gd"].Rows[0]["col1"];
                MemoryStream ms_LP1 = new MemoryStream(outbyte_LP1, 0, outbyte_LP1.Length);
                ms_LP1.Write(outbyte_LP1, 0, outbyte_LP1.Length);

                pctimg1.Image = Image.FromStream(ms_LP1, true);

            }}
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }}

    private void btn_close_Click(object sender, EventArgs e)
    {
        if (conS.State == ConnectionState.Open)
        {
            conS.Close();}
        this.Close();}}}