Error Cannot Perform Operation On System String And System Int32
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings cannot perform operation on system string and system boolean and policies of this site About Us Learn more about Stack Overflow cannot perform '=' operation on system.string and system.int32. + rowfilter the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags cannot perform '=' operation on system.decimal and system.string c# Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only cannot perform operation on system double and system string takes a minute: Sign up C# error: System.Data.EvaluateException: Cannot perform '=' operation on System.String and System.Int32 up vote 1 down vote favorite Using C#, I'm getting an exception: System.Data.EvaluateException: Cannot perform '=' operation on System.String and System.Int32. I've traced it back to this code: foreach (DataRow rows in dt.Rows){ ...etc string filter = string.Format("CUST_ID = " + rows[0]); DataRow[] row
Datatable Select Cannot Perform Operation On System Double And System String
= dt.Select(filter); After the foreach I go to a bool which uses linq to find if a record with the same CUST_ID in DT exists in another datatable. If false then I go to the string filter. Here I take all of the records not existing in the second datatable and use SqlBulkCopy to put them all in a DB. The funny thing is that just a hand full of records don't work. There are about 7000 of them and roughly 50 will cause this exception. I don't see any difference between the records. So, I'm not sure what I'm missing. EDIT: One of the records has CUST_ID = 998947 which would throw the exception. I change the CUST_ID to 987654 and there was no exception. c# datarow share|improve this question edited Dec 18 '14 at 22:39 asked Dec 18 '14 at 22:31 Bobby Turkalino 56112 In which line does the code throw? –Arturo Torres Sánchez Dec 18 '14 at 22:40 the DataRow[] line –Bobby Turkalino Dec 18 '14 at 22:41 Which is the
here for a
Cannot Perform Operation On System Datetime And System String
quick overview of the site Help Center Detailed missing operand after '=' operator. answers to any questions you might have Meta Discuss the workings and policies cannot perform like operation on system decimal and system string of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting http://stackoverflow.com/questions/27556864/c-sharp-error-system-data-evaluateexception-cannot-perform-operation-on-sy ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a http://stackoverflow.com/questions/20408288/cannot-perform-operation-on-system-string-and-system-int32 minute: Sign up Cannot perform '=' operation on System.String and System.Int32? up vote 1 down vote favorite I tried bind a label from result SqlDataSource.But I get this error Cannot perform '=' operation on System.String and System.Int32
Studio Languages , .NET Framework > Visual C# Question 0 Sign in to vote Hi. Please someone help with this error: cannot perform '>=' operation on system.int32 and system.string This is https://social.msdn.microsoft.com/Forums/vstudio/en-US/5dcec112-21b2-48d3-a8fd-6afd717a9495/cannot-perform-operation-on-systemint32-and-systemstring?forum=csharpgeneral the error which always give me when executing this one when comparing prices between two values like, i > 5 && i < 10: dataGrid6.DefaultView.RowFilter = "Price >= " + textBox6.Text + "' And http://www.dreamincode.net/forums/topic/241226-cannot-perform-operation-on-systemint32-and-systemstring/ Price <= " + textBox7.Text + "'"; The interesting thing is when i load excel file in datagridview and try executing this one works, but when i scrape data from website and than executing cannot perform this one in the other gridview for new scraped data this error shows. please help. just this query not work i've tried to executre other with LIKE works well. tnx Edited by Ensiferum77 Sunday, May 18, 2014 4:12 AM Found solution for my prev question, but now i have new one Sunday, May 18, 2014 12:34 AM Reply | Quote Answers 0 Sign in to vote Unfortunately, that's not operation on system going to work correctly for you in all circumstances. Since you're now comparing strings instead of actual numeric data, you won't get valid comparisons (for example, 10 will be less than 2, because as a string, "1" is less than "2" and "10" will also be less than "2"). You really need to have that DataColumn be a double in your DataTable. You didn't answer my question as to how you're getting the data into that DataTable.~~Bonnie DeWitt [C# MVP] http://geek-goddess-bonnie.blogspot.com
Marked as answer by CaillenModerator Sunday, May 25, 2014 12:25 AM Sunday, May 18, 2014 8:43 PM Reply | Quote Moderator 0 Sign in to vote Hello, There is 'things' that happen under the covers when reading sheet data via OleDb that you are by default not in control of but there are literally countless ways to circumvent the default behavior from altering setting in the system registry to how you load data. No matter which method you use there are good and bad things to contend with. Let's say a column has integers and doubles, when loading them into a DataTable via OleDb connection and command I would suspect if you interrogate the data type of each column with no formatting these(2 Pages) 1 2 → New Topic/Question Reply 24 Replies - 14368 Views - Last Post: 27 July 2011 - 04:17 PM Rate Topic: #1 aueddonline New D.I.C Head Reputation: 0 Posts: 22 Joined: 09-July 11 Cannot perform '=' operation on System.Int32 and System.String Posted 27 July 2011 - 06:50 AM I have this error ; Cannot perform '=' operation on System.Int32 and System.String. It's as a result of the following code ; invoiceDate = dropDownInvoiceDateSelect.Text; //Need to get the InvoiceID based on the date DataRow[] foundRows = ds1.Tables["Accounts.Invoice"].Select("InvoiceID= '" + invoiceDate + "'"); invoiceID = foundRows[0][0].ToString(); addItemTester.Text = invoiceDate; I want to use this invoiceID to add items to another table Is This A Good Question/Topic? 0 Back to top MultiQuote Quote + Reply Replies To: Cannot perform '=' operation on System.Int32 and System.String #2 Curtis Rutland （╯°□°）╯︵ (~ .o.)~ Reputation: 5062 Posts: 9,194 Joined: 08-June 10 Re: Cannot perform '=' operation on System.Int32 and System.String Posted 27 July 2011 - 06:54 AM Well, I'd guess that invoiceID is an integer, not a string. Strings aren't integers, and you can't assign them that way. You can either Convert, Parse, or TryParse. Was This Post Helpful? 0 Back to top MultiQuote Quote + Reply #3 modi123_1 Suitor #2 Reputation: 12164 Posts: 47,713 Joined: 12-June 08 Re: Cannot perform '=' operation on System.Int32 and System.String Posted 27 July 2011 - 06:55 AM What line? Read what that exception is saying. You cannot use the "=" sign (aka get) to push a string into an integer. Usually that means you need to convert that string to an integer first. Think of it this way - the compiler wants you to prevent things like an integer getting this string "aaa". Pushing characters into an integer is a bad thing! This post has been edited by modi123_1: 27 July 2011 - 06:56 AM Was This Post Helpful? 0 Back to top MultiQuote Quote + Reply #4 aueddonline New D.I.C Head Reputation: 0 Posts: 22 Joined: 09-July 11 Re: Cannot perform '=' operation on System.Int32 and System.String Posted 27 July 2011 - 07:31 AM okay, I was trying to pass the select the InvoiceID rather that the InvoiceDate It now returns; "Index was outside the bounds of the array" I think this is because the Invoice date I'm sending across is "2011-07-04 23:57:18" where as it's stored in the database as "2011-07-04 23:57:18.5930000" I'm not sure why m