如何在保存到数据库之前检查单元格是否为空

Question

您好我有3个柱面的粗糙视图我想检查列2 & 3是否为空显示消息说在执行保存代码之前，但我不能在这里做到这一点是我的代码保存

 //second part 
     for (int i = 0; i < dataGridView1.Rows.Count; i++) 
     { 
      condatabase.Open(); 

      string Query1 = "insert into mal_makbodatsandok_det (ERADID,ERADTYPENAME,BAYAN,MONY) values('"+txtID.Text+"','" + this.dataGridView1.Rows[i].Cells[1].Value + "','" + this.dataGridView1.Rows[i].Cells[2].Value + "','" + this.dataGridView1.Rows[i].Cells[3].Value + "') ;"; 


      SqlCommand cmddatabase = new SqlCommand(Query1, condatabase); 
      myreader = cmddatabase.ExecuteReader(); 

      while (myreader.Read()) 
      { 

      } 

      condatabase.Close(); 
    } 

     MessageBox.Show("saved"); 

PLZ有人告诉我如何保存

Answer 1

尝试类似的东西

if (dataGridView1.CurrentCell.Value == DBNull.Value) 
{ 
    MessageBox.Show("null"); 
} 
else 
{ 
    MessageBox.Show("not null"); 
} 

希望我前检查吨工作。插入前

Answer 2

调用方法

if(ValidateGridView() != -99) 
    { 
    //Insert Logic 
    } 
    else 
    { 
    //display error message 
    } 



    private int ValidateGridView() 
    { 
     for (int i = 0; i < dataGridView1.Rows.Count; i++) 
     { 
      if(this.dataGridView1.Rows[i].Cells[1].Value != string.Empty && 
     this.dataGridView1.Rows[i].Cells[2].Value != string.Empty && 
     this.dataGridView1.Rows[i].Cells[3].Value != string.Empty) 
      {} 
      else 
      { 
      return i; 
       //Return line number and display message, fields on this row number can not be empty 
      } 
     return -99; //if return is -99 means no row has empty value 

     } 
    }