迴路中，從而讀取C＃DataGridView的幾行

Question

我有一個DataGrid（grid_detail），因爲我現在已經只閱讀它的單排和保存到數據庫中使用的代碼如下

  //number of columns actually in second dgv 
      int col_no = grid_detail.ColumnCount; 
      int row_no = grid_detail.RowCount - 1; 
      int r = 0; 



      //array to contain the values of the cells 
      string[] col_value = new string[100]; 
      for (i = 0; i < col_no; i++) 
      { 
       //fill in the Array with values from cells 
       col_value[i] = Convert.ToString(grid_detail.Rows[0].Cells[i].Value); 
      } 
      //Build insert command 
      StringBuilder Q = new StringBuilder(); 
      Q.Append("INSERT INTO "); 
      Q.Append("[Ref].["); 
      Q.Append(_lstview_item); 
      Q.Append("]"); 
      Q.Append(" VALUES"); 
      Q.Append("("); 
      for (i = 0; i < col_no; i++) 
      { 
       Q.Append("'"); 
       if (string.IsNullOrEmpty(col_value[i])) 
       { 
        x = false; 
        break; 
       } 
       else 
       { 
        Q.Append(col_value[i]); 
        Q.Append("'"); 
        Q.Append(","); 
        x = true; 
       } 
      } 
      //removing last COMMA from loop 
      if (col_no > 0) 
      { 
       Q.Length--; 
      } 
      Q.Append(")"); 
      query = Q.ToString(); 



      if (x == true) 
      { 
       //open connection to db and send query 
       SqlConnection conn = new SqlConnection(cc.connectionString(cmb_dblist.Text)); 
       SqlCommand cmd_server = new SqlCommand(query); 
       cmd_server.CommandType = CommandType.Text; 
       cmd_server.Connection = conn; 
       conn.Open(); 
       cmd_server.ExecuteNonQuery(); 
       conn.Close(); 

然而，我的要求是，我現在閱讀了一行Z網格並保存到數據庫。 我試圖用一個for循環的行數像

for (r=0;r<row_no;r++) 
{ 

/////CODES ABOVE PASTED HERE 

} 

我不能做循環。

請幫忙。

Answer 1

我假設你根據grid_detail行數有row_no集，然後再做修改和測試

for (int r=0; r< grid_detail.RowCount; r++) 
{ 
    // your code... 
    //int r = 0; comment this line 
    // your code... 
    //............. 
      for (i = 0; i < col_no; i++) 
      { 
       //fill in the Array with values from cells 
       col_value[i] = Convert.ToString(grid_detail.Rows[r].Cells[i].Value); // use row r 
      } 
    //............. 
    // your code... 

} 

以下，但我會重新因素代碼下面

foreach (GridViewRow row in GridView1.Rows) 
{ 
    string sql = GenerateSql(row); 
    if (!string.IsNullOrEmpty(sql)) 
     ExecuteNonQuery(sql); 
} 
private void ExecuteNonQuery(string query) 
{ 
    using (SqlConnection conn = new SqlConnection(connectionString)) 
    using (SqlCommand cmd_server = new SqlCommand(query, conn)) 
    { 
     conn.Open(); 
     cmd_server.ExecuteNonQuery(); 
    } 
} 

private string GenerateSql(GridViewRow row) 
{ 
    var values = row.Cells.Cast<TableCell>().Select(x => x.Text).ToArray(); 
    if (values.Any(string.IsNullOrEmpty)) 
    { 
     return string.Empty; 
    } 
    var sql = string.Format("INSERT INTO [Ref].[{0}] VALUES ({1})", _lstview_item, string.Join(",", values)); 

    return sql;  

}