上传图片，显示图片
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.IO;
namespace WAJS
{
public partial class F_HJWF_UploadImg : Form
{
string djbh = "";
public F_HJWF_UploadImg(string _djbh)
{
djbh = _djbh;
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.InitialDirectory = "C:\\";
openFileDialog1.Filter = "图片文件 (*.jpg)|*.jpg";
openFileDialog1.FilterIndex = 1;
openFileDialog1.RestoreDirectory = true;
openFileDialog1.Multiselect = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
textBox1.Text = openFileDialog1.FileName;
}
}
//上传按钮事件处理
private void button2_Click(object sender, EventArgs e)
{
Save(PhotoToArray(textBox1.Text.ToString()));
show();
}
//将图片信息转换成二进制信息
private byte[] PhotoToArray(string path)
{
FileStream stream = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] bufferPhoto = new byte[stream.Length];
stream.Read(bufferPhoto, 0, Convert.ToInt32(stream.Length));
stream.Flush();
stream.Close();
return bufferPhoto;
}
//把二进制的图片插到数据库
private void Save(byte[] image)
{
string sql = "UPDATE HJWF SET TPSC = (@TPSC) where id = "+djbh;
SqlParameter param = new SqlParameter();
param = new SqlParameter("@TPSC", SqlDbType.Image);
param.Value = image;
SqlConnection SaveDataConnect = new SqlConnection(AppTool.ConStr);
SqlCommand commd = new SqlCommand(sql, SaveDataConnect);
commd.Parameters.Add(param);
try
{
SaveDataConnect.Open();
commd.ExecuteNonQuery();
MessageBox.Show("您已经把图片成功的更新到数据库！");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
SaveDataConnect.Close();
}
}
//显示图片按钮事件处理
private void show()
{
string strSQL = "Select [TPSC] From [HJWF] Where id = "+djbh;
SqlParameter param = new SqlParameter();
//param = new SqlParameter("@photo", SqlDbType.Int);
//param.Value = comboBox1.Text.ToString();
SqlConnection SaveDataConnect = new SqlConnection(AppTool.ConStr);
SqlCommand cmd = new SqlCommand(strSQL, SaveDataConnect);
//cmd.Parameters.Add(param);
SaveDataConnect.Open();
System.Data.SqlClient.SqlDataReader reader = cmd.ExecuteReader();
try
{
reader.Read();
if (string.IsNullOrEmpty(reader["TPSC"].ToString())) return;
MemoryStream ms = new MemoryStream((byte[])reader["TPSC"]);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true);
this.pictureBox1.Image = image;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
SaveDataConnect.Close();
}
}
private void F_HJWF_UploadImg_Load(object sender, EventArgs e)
{
show();
}
private void button3_Click(object sender, EventArgs e)
{
Close();
}
//private void Form1_Load(object sender, EventArgs e)
//{
// // TODO: 这行代码将数据加载到表“myPhotoDataSet.Photo”中。您可以根据需要移动或移除它。
// this.photoTableAdapter.Fill(this.myPhotoDataSet.Photo);
//}
}
}
小问题
能让在picturebox中的图片大小随picturebox的大小变化吗？
把PictureBox的SizeMode设为 StretchImage 就可以让图片随PictureBox Resize了。
gridview中添加按钮
private void dataGridView2_CellEnter(object sender, DataGridViewCellEventArgs e)
{
this.dataGridView2.Controls.Clear();//移除所有控件
if (e.ColumnIndex.Equals(this.dataGridView2.Columns["上传图片"].Index))
//判断单元格是否是"Company"列？
{
System.Windows.Forms.Button btn = new System.Windows.Forms.Button();//创建Buttonbtn
btn.Text = "上传";//设置button文字
btn.Font = new System.Drawing.Font("Arial", 7);//设置文字格式
btn.Visible = true;//设置控件允许显示
btn.Width = this.dataGridView2.GetCellDisplayRectangle(e.ColumnIndex,
e.RowIndex, true).Width;//获取单元格高并设置为btn的宽
btn.Height = this.dataGridView2.GetCellDisplayRectangle(e.ColumnIndex,
e.RowIndex, true).Height;//获取单元格高并设置为btn的高
string DJBH = dataGridView2.Rows[e.RowIndex].Cells["ID"].Value.ToString();
label31.Text = DJBH;
btn.Click += new EventHandler(btn_Click);//为btn添加单击事件
this.dataGridView2.Controls.Add(btn);//dataGridView2中添加控件btn
btn.Location = new System.Drawing.Point(((this.dataGridView2.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Right) -
(btn.Width)), this.dataGridView2.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, true).Y);//设置btn显示位置
}
}
void btn_Click(object sender, EventArgs e)
{
F_HJWF_UploadImg f = new F_HJWF_UploadImg(label31.Text);
f.ShowDialog();
}