Visual Studio is giving me the following error when I submit and store in the database.
"string must be exactly one character long"
to try to resolve tried this but without success:
cmd.Parameters.Add("#nomeEmpresa", OleDb.OleDbType.Integer).Value = Convert.ToChar(cbxEmpresa.Text)
cmd.Parameters.Add("#nomeContacto", OleDb.OleDbType.Integer).Value = Convert.ToChar(txtNomeContacto.Text)
cmd.Parameters.Add("#apelidoContacto", OleDb.OleDbType.Integer).Value = Convert.ToChar(txtApelidoContacto.Text)
cmd.Parameters.Add("#funcao", OleDb.OleDbType.Integer).Value = Convert.ToChar(txtFuncao.Text)
how can I solve this problem?
If you look at the documentation of Convert.ToChar you could read
Converts the first character of a specified string to a Unicode
character. Namespace: System Assembly: mscorlib (in mscorlib.dll)
Syntax
public static char ToChar( string value )
valueType: System.String
A string of length 1.
That's the reason of your error.
However your code seems to be incorrect. If you want to pass Integer values types by your user to your sql you need to convert your input using something like Int32.TryParse(textbox.text)
Instead if you want to pass string values you need to change your parameter type to SqlDbType.NVarChar.
Convert.ToChar(string) requires that the string only contain a single character. You need to gaurrantee this for each of the strings before you call it, or manually select the first character from the string, or something similar.
Docs for Convert.ToChar(string), throws FormatException "The length of value is not 1."
http://msdn.microsoft.com/en-us/library/5f3ew98y(v=vs.110).aspx
Related
i got an issue with my Code. Im using Android Studio with Kotlin.
So, i got an EditText-field with an input-type="numberDecimal".
when i try to convert that string to a Double:
val preis = etProduktGekauftPreis.text.toString().toDouble()
and try to create a new Object with the "preis"
val produkt = Produkt(name, anzahl.toInt(), preis)
For example im getting the error: NumberFormatException: For input string: "3.00"
The string is a valid representation of a number or not? why do i keep getting this Error?
Thanks for the help :)
Its due to your locale, in german it would be expected to give "3,00" instead of "3.00". You would need to parse the string correctly/differently for example by replacing the comma based on what ever possible locales you support or by removing the comma converting to double then dividing by 100
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select from list by index ${locator_var} ${inp_msge_type}
--getting error as expected string, int found
select from list by index ${locator_var} 7
-----not getting any error
${inp_msge_type}----contains 7 from DB query the result is stored in this variable, to avoid hard coding we need to do this
Is there any way to write
Do not add links to screenshots of code, or error messages, and format the code pieces accordingly - use the ` (tick) symbol to surround them.
The rant now behind us, your issue is that the keyword Select From List By Index expects the type of the index argument to be a string.
When you called it
Select From List By Index ${locator_var} 7
, that "7" is actually a string (though it looks like a number), because this is what the framework defaults to on any typed text. And so it works.
When you get the value from the DB, it is of the type that the DB stores it with; and probably the table schema says it is int. So now you pass an int to the keyword - and it fails.
The fix is simple - just cast (convert) the variable to a string type:
${inp_msge_type}= Convert To String ${inp_msge_type}
, and now you can call the keyword as you did before.
I'm generating a dynamic sql query based on some user input. Here is the code that prepares the query:
var preparedParamValues = paramValues.map(paramValue => `'${paramValue}'`).join(',');
var sql = `INSERT INTO [DB] (${paramNames}) VALUES (${preparedParamValues})`;
When I send the following string to the DB it throws the below error:
'They're forced to drive stupid cars.'
I get an error :
'Unclosed quotation mark after the character string \')\'.'
I'm trying to find a way to escape all those characters but I don't understand the error or at least the last part of it with all the symbols.
You have to use two single quotes when a single quote appears in the string:
'They''re forced to drive stupid cars.'
I'm getting this message in Redshift: invalid input syntax for type numeric: " " , even after trying to implement the advice found in SO.
I am trying to convert text to number.
In my inner join, I try to make sure that the text being processed is first converted to null when there is an empty string, like so:
nullif(trim(atl.original_pricev::text),'') as original_price
... I noticed from a related post on coalesce that you have to convert the value to text before you can try and nullif it.
Then in the outer join, I test to see that there's a limited set of acceptable characters and if this test is met I try to do the to_number conversion:
,case
when regexp_instr(trim(atl.original_price),'[^0-9.$,]')=0
then to_number(atl.original_price,'FM999999999D00')
else null
end as original_price2
At this point I get the above error and unfortunately I can't see the details in datagrip to get the offending value.
So my questions are:
I notice that there is an empty space in my error message:
invalid input syntax for type numeric: " " . Does this error have the exact same meaning as
invalid input syntax for type numeric:'' which is what I see in similar posts??
Of course: what am I doing wrong?
Thanks!
It's hard to know for sure without some data and the complete code to try and reproduce the example, but as some have mentioned in the comments the most likely cause is the to_number() function you are using.
In the earlier code fragment you are converting original_price to text (string) and then substituting an empty string ('') if the value is NULL. Calling the to_number() function on an empty string will give you the error described.
Without the full SQL statement it's not clear why you're putting the nullif() function around the original_price in the "inner join" or how whether the CASE statement is really in an outer join clause or one of the columns returned by the query. However you could perhaps alter the nullif() to substitute a value that can be converted to a number e.g. '0.00' instead of ''.
Sorry I couldn't share real data. I spent the weekend testing small sets to try and trap the error. I found that the error was caused by the input string having no numbers, which is permitted by my regex filter:
when regexp_instr(trim(atl.original_price),'[^0-9.$,]') .
I wrongly expected that a non numeric string like "$" would evaluate to NULL and then the to_number function would = NULL . But from experimenting it seems that it needs at least one number somewhere in the string. Otherwise it reduces the string argument to an empty string prior to running the to_number formatting and chokes.
For example select to_number(trim('$1'::text),'FM999999999999D00') will evaluate to 1 but select to_number(trim('$A'::text),'FM999999999999D00') will throw the empty string error.
My fix was to add an additional regex to my initial filter:
and regexp_instr(atl.original_price2,'[0-9]')>0 .
This ensures that at least one number will be in the string and after that the empty string error went away.
Hope my learning experience helps someone else.
I have a string to modify as per the requirements.
For example:
The given string is:
str1 varchar = '123,456,789';
I want to show the string as:
'456,789'
Note: The first part (delimited) with comma, I want to remove from string and show the rest of string.
In SQL Server I used STUFF() function.
SELECT STUFF('123,456,789',1,4,'');
Result:
456,789
Question: Is there any string function in PostgreSQL 9.3 version to do the same job?
you can use regular expressions:
select substring('123,456,789' from ',(.*)$');
The comma matches the first comma found in the string. The part inside the brackets (.*) is returned from the function. The symbol $ means the end of the string.
A alternative solution without regular expressions:
select str, substring(str from position(',' in str)+1 for length(str)) from
(select '123,456,789'::text as str) as foo;
You could first turn the string to array and return second and third cell:
select array_to_string((regexp_split_to_array('123,456,789', ','))[2:3], ',')
Or you could use substring-function with regular expressions (pattern matching):
SELECT substring('123,456,789' from '[0-9]+,([0-9]+,[0-9]+)')
[0-9]+ means one or more digits
parentheses tell to return that part from the string
Both solutions work on your specific string.
Your The SQL Server example indicates you just want to remove the first 4 characters, which makes the rest of your question seem misleading because it completely ignores what's in the string. Only the positions matters.
Be that as it may, the simple and cheap way to cut off leading characters is with right():
SELECT right('123,456,789', -4);
SQL Fiddle.