保存的DataGridView數據到SQL Server數據庫的Winform

這裏是UI的樣本圖像：保存的DataGridView數據到SQL Server數據庫的Winform

我工作的一個項目，將導入Excel文件並通過顯示數據到一個DataGridView Windows窗體。導入Excel文件並在DataGridView中顯示它工作正常，我遇到的問題是將數據保存在DataGridView中作爲批量插入，當我單擊Save按鈕時，它顯示一個

錯誤的屏幕截圖：

An unhandled exception of type 'System.ArgumentException' occured in System.Data.dll

當我查看詳細信息它顯示：

No mapping exists from object type System.Windows.Forms.DataGridViewTextBoxColumn to a known managed provider native type.

代碼：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 

using System.Data.OleDb; 
using System.Data.SqlClient;

SAVE按鈕代碼

 private void btn_Save_Click(object sender, EventArgs e) 
     { 

      foreach (DataGridViewRow row in dataGridView1.Rows) 
      { 
       string constring = @"Data Source=databasename;Initial Catalog=Rookies;Integrated Security=True"; 

       using(SqlConnection con = new SqlConnection(constring)) 
       { 
        using (SqlCommand cmd = new SqlCommand("INSERT INTO tbl_prospects ([prospectid], [firstname], [lastname], [height], [weight], [age], [college])VALUES(@prospectid, @firstname, @lastname, @height, @weight, @age, @college)", con)) 
        { 
         cmd.Parameters.AddWithValue("@prospectid", prospectidDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@firstname", firstnameDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@lastname", lastnameDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@height", heightDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@weight", weightDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@age", ageDataGridViewTextBoxColumn); 
         cmd.Parameters.AddWithValue("@college", collegeDataGridViewTextBoxColumn); 

         con.Open(); 
         cmd.ExecuteNonQuery(); 
         con.Close(); 
        } 
       } 
      } 
      MessageBox.Show("Successfully Saved!"); 
     } 



    } 
}

我還包括以下

瀏覽按鈕CODE

private void btn_Browse_Click(object sender, EventArgs e) 
    { 
     OpenFileDialog openFileDialog1 = new OpenFileDialog(); 

     if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) 
     { 
      this.txt_Path.Text = openFileDialog1.FileName; 
     } 
    }

LOAD按鈕代碼

private void btn_Load_Click(object sender, EventArgs e) 
    { 
     string PathConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + txt_Path.Text + ";Extended Properties=\"Excel 8.0;HDR=Yes;\";"; 
     OleDbConnection conn = new OleDbConnection(PathConn); 

     OleDbDataAdapter myDataAdapter = new OleDbDataAdapter("Select * from [" + txt_Sheet.Text + "$]", conn); 
     DataTable DT = new DataTable(); 

     myDataAdapter.Fill(DT); 

     dataGridView1.DataSource = DT; 
    }

其他代碼

我是C＃編程新手，想要學習它，如果有人能提前幫助我做我要做的事情，這將是我的第一個應用程序。

來源

2016-04-14 jeff

你可以從每一行的值這樣

foreach (DataGridViewRow row in dataGridView.Rows) 
{ 
    // your code 

    cmd.Parameters.AddWithValue("@prospectid",row.Cells["ColumnName"].Value.ToString()); 
}

來源

2016-04-14 10:41:01

這不是批量插入，你可以找到很好的答案批量插入鏈接 - http://stackoverflow.com/questions/5022531/best-way-to-bulk-insert-from-ac-sharp-datatable/ 5022716＃5022716 –

謝謝！我試過這個，當我運行該文件時得到了這個錯誤。 {「無法找到名爲prospectid的列。\ r \ nParameter name：columnName」} – jeff

檢查row.Cells [「ColumnName」]中的DataGridView列的名稱。通常，這與Excel文件中的列名相同 –

我的第一句話：只能使用1次對象SqlConnextion並且最好是現在添加的SqlTransaction對象，以免在情況下數據的部分記錄DataGridView的一行錯誤。的答案，你需要指定每列

private void btn_Save_Click(object sender, EventArgs e) 
{ 
    string constring = @"Data Source=databasename;Initial Catalog=Rookies;Integrated Security=True"; 
    SqlConnection con = new SqlConnection(constring); 
    SqlTransaction transaction = con.BeginTransaction(); 
    try 
    { 
     con.Open(); 
     foreach (DataGridViewRow row in dataGridView1.Rows) 
     { 
      using (SqlCommand cmd = new SqlCommand("INSERT INTO tbl_prospects ([prospectid], [firstname], [lastname], [height], [weight], [age], [college])VALUES(@prospectid, @firstname, @lastname, @height, @weight, @age, @college)", con)) 
      { 
       cmd.Parameters.AddWithValue("@prospectid", row.Cells["prospectid"].Value); 
       cmd.Parameters.AddWithValue("@firstname", row.Cells["firstname"].Value); 
       cmd.Parameters.AddWithValue("@lastname", row.Cells["lastname"].Value); 
       cmd.Parameters.AddWithValue("@height", row.Cells["height"].Value); 
       cmd.Parameters.AddWithValue("@weight", row.Cells["weight"].Value); 
       cmd.Parameters.AddWithValue("@age", row.Cells["age"].Value); 
       cmd.Parameters.AddWithValue("@college", row.Cells["college"].Value); 
       cmd.Transaction = transaction; 
       cmd.ExecuteNonQuery(); 
      } 
     } 
     transaction.Commit(); 
     con.Close(); 
     MessageBox.Show("Successfully Saved!"); 
    } 
    catch (Exception ex) 
    { 
     transaction.Rollback(); 
     con.Close(); 
     MessageBox.Show(ex.Message); 
    } 
}

來源

2016-04-14 10:50:17

檢查row.Cells [「ColumnName」]中的DataGridView列的名稱值 –

通常，這與Excel文件中的列名相同 –

您可以直接使用SqlBulkCopy的寫數據表到SQL Server，而不是做一行一行的單元格的值。

string constring = @"Data Source=databasename;Initial Catalog=Rookies;Integrated Security=True"; 

using (var bulkCopy = new SqlBulkCopy(constring)) 
{ 
     bulkCopy.BatchSize = 500; 
     bulkCopy.NotifyAfter = 1000; 

     bulkCopy.DestinationTableName = "TableName"; 
     bulkCopy.WriteToServer(dataTable); 
}

還有各種SqlBulkCopy構造函數可以傳遞SqlConnection和SqlTransaction。

來源

2016-04-14 10:53:07 Pankaj

保存的DataGridView數據到SQL Server數據庫的Winform

回答

相關問題