绑定OLEDB异常丢失的运算符

Question

CODE：

//this is in private void Form3_Load(object sender, EventArgs e) 
{string sql = "select * from doctofact WHERE (([doctofact].[docid]=" + l + " and  [doctofact].[1userid]='"+str6+"'))"; 
    da = new OleDbDataAdapter(sql, con); 
     cmd = new OleDbCommandBuilder(da); 
     dt = new DataTable(); 
     BindingSource dsource = new BindingSource(); 
     dsource.DataSource = dt; 
     da.Fill(dt); 
     dataGridView1.DataSource = dt; 
      dataGridView1.ReadOnly = true; 


     da.Update(dt); 
     } 


    private void button3_Click(object sender, EventArgs e) // edit button 
    { 
     dataGridView1.ReadOnly = false; 

     MessageBox.Show("Click on the cell you want to edit and change"); 
    } 


     private void button4_Click(object sender, EventArgs e) //save button 
    { 
     da.Update(dt); 
     MessageBox.Show("The changes you made have been saved!"); 
    } 

现在我的datagridview显示我想究竟是什么所以它只是意味着该查询“SQL”是工作的罚款。只有编辑并尝试通过单击保存按钮进行绑定时才会出现此问题。我得到的错误是：

oledb exception missing operator in the query Syntax error (missing operator) in query expression '(((? = 1 AND DocID IS NULL) OR (DocID = ?)) AND ((? = 1 AND FactID IS NULL) OR (FactID = ?)) AND ((? = 1 AND ArticleTitle IS NULL) OR (ArticleTitle = ?)) AND ((? = 1 AND FactPreview IS NULL) OR (FactPreview = ?)) AND ((? = 1 AND 1userid IS NULL) OR (1user'. 

Answer 1

我会建议你通过这个链接。 Check This Link

问题是由于数据类型不匹配