Winform DataGridView图片列显示重复的图片
datagridview图片列后台添加
现在查询前三行数据，第一行和第二行的图片是存在的，第三行的图片由于服务器没有此图片，就给了一个默认图片，现在for循环后，第一行和第二行的图片都会被默认的图片所覆盖，不知道原因，求教！！！
代码如下：
public void Bind(string state)
{
string picname = "";
SqlConnection conn = new SqlConnection(constring);
DataTable dt = new DataTable();
SqlDataAdapter adp = null;
if (state == "1dd")
{
adp = new SqlDataAdapter("select top 3 * from product", conn);
}
else if (state != "1dd")
{
adp = new SqlDataAdapter("select * from Product where ShortTitle like '%" + state + "%'", conn);
gdvPorductList.Columns.Remove("img");
}
adp.Fill(dt);
this.gdvPorductList.RowTemplate.Height = 100;
this.gdvPorductList.DataSource = dt;
DataGridViewTextBoxColumn dgvc = (DataGridViewTextBoxColumn)this.gdvPorductList.Columns["ID"];
DataGridViewImageColumn column = new DataGridViewImageColumn();
column.Name = "img";
// gdvPorductList.Columns.Add(column);
gdvPorductList.Columns.Insert(2, column);
column.HeaderText = "img";
SqlConnection cn = new SqlConnection(constring);
if (state == "1dd")
{
// this.gdvPorductList.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader;//指定dataGridView的Column和Row的自动大小模式.
// this.gdvPorductList.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders;
// column.ImageLayout = DataGridViewImageCellLayout.Zoom;//使图片自动适应单元格大小
for (int a = 0; a < dgvc.DataGridView.Rows.Count; a++)
{
try
{
string strSQL = "select Name from dbo.Img where state=1 and ProductID=" + dgvc.DataGridView.Rows[a].Cells["ID"].FormattedValue;
SqlCommand cmd = new SqlCommand(strSQL, cn);
cn.Open();
string name = (string)cmd.ExecuteScalar();
if (name == null) //代表没有图片，可以用默认的
{
picname = "C://Users//IT3//Desktop//no_pic.jpg";
// dgvcc.Value = Image.FromFile(picname);
// string a2 = Application.StartupPath + @"\no_pic.jpg";
column.Image = System.Drawing.Image.FromFile(picname);
((DataGridViewImageCell)this.gdvPorductList.Rows[a].Cells["img"]).Value = column.Image;
}
else
{
try
{
picname = name;
// string path = AppDomain.CurrentDomain.BaseDirectory + picname;
string urlfilename = @"" + picname + "";
string replacename=picname.Replace("/","\\");
string[] sp = urlfilename.Split(new string[] { @"/", @"\" }, StringSplitOptions.RemoveEmptyEntries);
string yearmonthDir = sp[0];
string filename = sp[1];
string localfileDir = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "img", yearmonthDir);
if (!Directory.Exists(localfileDir))//说明:
{
Directory.CreateDirectory(localfileDir);
}
string picname1 = urlWeb + "Images/Product/Adv/" + picname;
// string filepath = @"C:\" + name;
string filepath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "img", name);
WebClient mywebclient = new WebClient();
string pathname = "";
mywebclient.DownloadFile(picname1, filepath);
pathname = @"" + AppDomain.CurrentDomain.BaseDirectory + @"img\" + replacename + "";
// column.Image = System.Drawing.Image.FromFile(urlWeb + "\\Images\\Product\\Adv\\" + name);
column.Image = System.Drawing.Image.FromFile(pathname);
((DataGridViewImageCell)this.gdvPorductList.Rows[a].Cells["img"]).Value = column.Image;
}
catch (Exception)
{
string pathname1 = "C://Users//IT3//Desktop//no_pic.jpg";
column.Image = System.Drawing.Image.FromFile(pathname1);
((DataGridViewImageCell)this.gdvPorductList.Rows[a].Cells["img"]).Value = column.Image;
if (((DataGridViewImageCell)this.gdvPorductList.Rows[1].Cells["img"]).Value == ((DataGridViewImageCell)this.gdvPorductList.Rows[2].Cells["img"]).Value)
{
string adaf = "1";
}else
{
string adaf = "12";
}
throw;
}
}
}
catch {
}
cn.Close();
}
}
// this.gdvPorductList.DataSource = dt;
}
winform datagridview --------------------编程问答-------------------- 你在前端用这种方法处理图片显示,感觉不好,应该以返回数据端未绑定时,先检查某一行是否有图片,没有就读取默认图片,或者直接在数据库的查询语句里面做好返回图片
补充：.NET技术 , ASP.NET
