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我嘗試從c#app保存圖像時遇到以下錯誤消息。到SQL Server 2008數據庫。將圖像保存到sql server 2008數據庫問題?
請注意,加載工作正常,問題在於保存。
請幫忙??
無法參數值從PictureBox的轉換爲字節[]
代碼保存圖像
private void saveLogo()
{
SqlConnection conn = new SqlConnection(dbcon.ReturnConnection());
try
{
SqlCommand sqlCommand1 = conn.CreateCommand();
sqlCommand1.CommandText = "INSERT INTO OrgLogo(ID,LogoName,Picture) values(@ID,@Name,@Picture)";
conn.Open();
if (sqlCommand1.Parameters.Count == 0)
{
sqlCommand1.Parameters.Add("@ID", System.Data.SqlDbType.Int, 4);
sqlCommand1.Parameters.Add("@Name", System.Data.SqlDbType.VarChar, 50);
sqlCommand1.Parameters.Add("@Picture", System.Data.SqlDbType.Image);
}
sqlCommand1.Parameters["@ID"].Value =Convert.ToInt32(editID.Text);
sqlCommand1.Parameters["@Name"].Value = editName.Text;
sqlCommand1.Parameters["@Picture"].Value = pictureBox1;
sqlCommand1.ExecuteNonQuery();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
conn.Close();
}
}
的代碼來打開圖像文件
protected void LoadLogoPic()
{
this.openFileDialog2.ShowDialog();
string strFn = this.openFileDialog2.FileName;
this.pictureBox1.Image = Image.FromFile(strFn);
this.openFileDialog2.Filter = "All Files|*.*|BMP Files|*.bmp|JPG Files|*.jpg";
FileInfo fiImage = new FileInfo(strFn);
m_lImageFileLength = fiImage.Length;
FileStream fs = new FileStream(strFn, FileMode.Open, FileAccess.Read, FileShare.Read);
m_barrImg = new byte[Convert.ToInt32(this.m_lImageFileLength)];
int iBytesRead = fs.Read(m_barrImg, 0, Convert.ToInt32(this.m_lImageFileLength));
fs.Close();
}
您正試圖存儲* PictureBox控件*而不是圖像的數據。如果將圖像的字節(即'm_barrImg')作爲參數值傳遞,則該語句至少適用於小圖片。對於較大的那個,您必須使用 –