将图片框图像插入Sqlite db＆amp;在c＃中检索

Question

对不起，我无法在网站上找到我的问题答案。

我有一个项目，通过使用Sqlite数据库提供和检索一些信息（文本类型数据）。

但是我想通过点击该图像的字段（下面的代码中的docImage）将图片添加到其中一列并进行检索。

你能帮我吗？

private void LoadData()
{
    SetConnection(); 
    sql_con.Open();

    sql_cmd = sql_con.CreateCommand();
    string CommandText = "select id, docImage, letternum, name, female, personnamber, organname, officename, numberofdoc, numberofbox, ticket, docdate   from  mains";
    DB = new SQLiteDataAdapter(CommandText,sql_con);
    DS.Reset();
    DB.Fill(DS);
    DT= DS.Tables[0];
    Grid.DataSource = DT;
    sql_con.Close();

}

private void SetConnection()
{
    sql_con = new SQLiteConnection("Data Source=DemoT.db;Version=3;New=False;Compress=True;");

}

private void ExecuteQuery(string txtQuery)
{
    SetConnection();
    sql_con.Open();

    sql_cmd = sql_con.CreateCommand();
    sql_cmd.CommandText=txtQuery;

    sql_cmd.ExecuteNonQuery();
    sql_con.Close();
}

private void Form1_Load(object sender, EventArgs e)
{
    LoadData();
}

private void Add()
{
    string txtSQLQuery = "insert into  mains (docImage, letternum, name, female, personnamber, organname, officename, numberofdoc, numberofbox, ticket, docdate ) values ('" + txtDesc11.Text + "','" + txtDesc.Text + "','" + txtDesc2.Text + "','" + txtDesc3.Text + "','" + txtDesc4.Text + "','" + txtDesc5.Text + "','" + txtDesc6.Text + "','" + txtDesc7.Text + "','" + txtDesc8.Text + "','" + txtDesc9.Text + "','" + txtDesc10.Text + "')";

    ExecuteQuery(txtSQLQuery);       
}   

private void btnAdd_Click(object sender, EventArgs e)
{
    Add();

    LoadData();
    btnAdd.Enabled = false;
    btnNew.Enabled = true;
    btnEdit.Enabled = false;

    txtDesc.Text = string.Empty;
    txtDesc2.Text = string.Empty;       
}