Question

我的Windows窗体中有一个按钮，可以更新每个表格。但是，我收到错误SQLException未处理。 '='附近的语法不正确。

这是我在更新按钮中的代码：

  public void btnUpdate_Click(object sender, EventArgs e)
  {

   foreach (DataGridViewRow row in dataGridView1.Rows)
   {
    try
    {

     //MessageBox.Show(row.Cells[7].FormattedValue.ToString());
     System.Data.SqlClient.SqlConnection sqlConnection1 =
      new System.Data.SqlClient.SqlConnection("server=Test\\Test; Integrated Security=true; Database=Testing;");

     System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
     cmd.CommandType = System.Data.CommandType.Text;
     cmd.CommandText = "UPDATE dbo.JobStatus SET ShipTrackingNumber = '" + row.Cells[7].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();
     cmd.CommandText = "UPDATE dbo.JobStatus SET ShipMethodTransmitted = '" + row.Cells[8].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();
     cmd.CommandText = "UPDATE dbo.JobStatus SET DateShipTransmitProcessed = '" + row.Cells[9].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();
     cmd.CommandText = "UPDATE dbo.JobStatus SET ShipmentProcessedBy = '" + row.Cells[10].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();
     cmd.CommandText = "UPDATE dbo.JobStatus SET Critical = '" + row.Cells[11].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();
     cmd.CommandText = "UPDATE dbo.JobStatus SET ShipTransmitStatus = '" + row.Cells[13].FormattedValue.ToString() + "' WHERE jobtableid = " + row.Cells[5].FormattedValue.ToString();

     cmd.Connection = sqlConnection1;

     sqlConnection1.Open();
     cmd.ExecuteNonQuery();
     sqlConnection1.Close();
    }
    catch (Exception e)
    {
     MessageBox.Show("Update Failed!!!");
    }

   }
  }

有谁能告诉我这些陈述有什么问题？谢谢！

Answer 1

为什么不在一个更新语句中简单地执行此操作。如下所示：

var sql = new StringBuilder();
sql.AppendLine( "UPDATE dbo.JobStatus" );
sql.AppendLine( "Set ShipTrackingNumber = @TrackingNumber" );
sql.AppendLine( ", DateShipTransmitProcessed = @DateShipTransmitProcessed" );
sql.AppendLine( ", ShipmentProcessedBy = @ShipmentProcessedBy" );
sql.AppendLine( ", Critical = @Critical" );
sql.AppendLine( ", ShipTransmitStatus = @ShipTransmitStatus" );
sql.AppendLine( "Where jobtableId = @jobTableId" );

cmd.Connection = sqlConnection1;
cmd.CommandText = sql.ToString();
cmd.Parameters.AddWithValue("@TrackingNumber", row.Cells[7].FormattedValue);
cmd.Parameters.AddWithValue("@DateShipTransmitProcessed", row.Cells[8].FormattedValue);
cmd.Parameters.AddWithValue("@ShipmentProcessedBy", row.Cells[9].FormattedValue);
cmd.Parameters.AddWithValue("@Critical", row.Cells[10].FormattedValue);
cmd.Parameters.AddWithValue("@ShipTransmitStatus", row.Cells[11].FormattedValue);
cmd.Parameters.AddWithValue("@jobTableId", row.Cells[5].FormattedValue);

Answer 2

除了我的评论中提到的内容;我没有看到SQL的语法有什么问题。您的FormattedValue很可能在字符串本身中有一个无效字符，这会导致SQL错误。在构建字符串之后打印出CommandText本身的值，以查看它实际上是什么样的。

Answer 3

请检查您的条件：

if(row.Cells[5].FormattedValue.ToString())
then execute update query

Answer 4

您的UPDATE声明不正确。 UPDATE语法为：

UPDATE table
   SET
      column1 = 'value',
      column2 = 'value2'
   WHERE
      condition;

每次分配到cmd时，您都会覆盖您的陈述。你可能想要更像的东西：

cmd =  "UPDATE table";
cmd += "SET column1 = '" + value + "',";
cmd += "SET column2 = " + intValue;
cmd += "WHERE idRow = '" + rowToUpdateValue + "'";

此外，如果这没有用，请检查您是否尝试使用'char'值检查INT列。

更新查询：语法不正确

4 个答案: