我需要阻止用户在应用程序上写下其他人的批准。我已经放入 Where IS NULL 以阻止它覆盖数据,但我需要显示一个标签,上面写着记录未更新为已批准。
我如何知道 sql 查询是否更新并获取该信息以便我可以执行 If 语句。
If row updated then
label.text = "data approved"
else
label.text = "You can not approve this as it's already approved"
CheckBox ckb = (CheckBox)sender;
GridViewRow row = (GridViewRow)ckb.Parent.Parent; //Get row selected
int idx = row.RowIndex;
//Get activity number ID for update query
Label lblDHActivityNoApp = (Label)row.Cells[0].FindControl("lblDHActivityNoApp");
string Number = lblDHActivityNoApp.Text.ToString();
string connectionString = ConfigurationManager.ConnectionStrings["PlusConnectionString"].ConnectionString;
string UpdateSql = "UPDATE Activities SET Status = @Status, ApprovedBy=@ApprovedBy, ApprovedDate=@ApprovedDate WHERE ApprovedBy IS NULL and (ActivityNo=@No)";
//Create SQL connection
SqlConnection con = new SqlConnection(connectionString);
//Create SQL Command And Sql Parameters
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandType = CommandType.Text;
cmd.CommandText = UpdateSql;
SqlParameter Status = new SqlParameter("@Status", SqlDbType.VarChar, 40);
Status.Value = "Approved";
cmd.Parameters.Add(Status);
SqlParameter ApprovedDate = new SqlParameter("@ApprovedDate", SqlDbType.VarChar, 50);
DateTime myDateTime = DateTime.Now; ;
ApprovedDate.Value = myDateTime.ToString("dd/MM/yy HH:mm:ss");
cmd.Parameters.Add(ApprovedDate);
SqlParameter ApprovedBy = new SqlParameter("@ApprovedBy", SqlDbType.VarChar, 40);
ApprovedBy.Value = (string)Session["Username"];
cmd.Parameters.Add(ApprovedBy);
SqlParameter No = new SqlParameter("@No", SqlDbType.VarChar, 50);
No.Value = Number;
cmd.Parameters.Add(No);
try
{
con.Open();
cmd.ExecuteNonQuery();
gbDHdetailsApp.DataBind(); //Reloads gridview with checked data
}
catch (SqlException ex)
{
string errorMessage = "Not approved, please contact support";
errorMessage += ex.Message;
throw new Exception(errorMessage);
}
finally
{
con.Close();
}
最佳答案
ExecuteNonQuery
返回受影响的行数。如果这是 0,您可以抛出一个 Exception
。
关于c# - 如何知道行是否更新,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38244023/