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5fingers wrote: A VS2010 bug?
No, you're doing something wrong.
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1. create table test(name varchar(20),status bit not null)
assume status has value 0 or 1. then fill to a dataset.
Bind a gridview directly to dataset.
Column status shows true or false on gridview which is ok.
To retrieve the status value from gridviewrow.cells[1].text return empty string.
Confirm.
I only read newbie introductory dummy books.
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DataGridViews will return an empty string from a cell which has a null value (i.e. DBNull.Value). These cells will show as empty in the visible grid, too.
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1. create table test(name varchar(20),status bit not null)
assume status has value 0 or 1. then fill to a dataset.
Bind a gridview directly to dataset.
Column status shows true or false on gridview which is ok.
To retrieve the status value from gridviewrow.cells[1].text return empty string.
Confirm.
I only read newbie introductory dummy books.
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What is the SQL column type? If it's text (that seems to be what you are saying), the easiest way is
bool answer = "True" == (string)row[colname];
If it's an integer type, try
bool answer = (bool)(int)row[colname];
... assuming you use the standard 0 = false. (You might be able to cast to bool directly but I imagine you tried that before asking here.)
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Thanks. The column is bit(0 or 1).
When i bind the column to gridview what i see from page is true or false.
When retrieve its value from the gridview row cell it shows blank string "" which cannot be converted to boolen value
I only read newbie introductory dummy books.
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If the SQL type is bit or int then
bool b = (bool)reader["ColumnName"];
If the SQL type is text(varchar or what have you) then something like
bool b = (bool)Convert.ToInt32(reader["ColumnName"]); should work
All the best,
Dan
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Thanks
I used a gridview row bound from a dataset. In sql type it is bit.
I used the dataset direct instead of gridview.
I only read newbie introductory dummy books.
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Hello.
I took this small function from anouther project, and I slightly modified it to work with a string object.
It accepts a string, and it should add a '-' for every nth charicture, as set by the code.
private void encodeString(string input)
{
for (int i = 0; i < input.Length-1; i++)
{
if ((i + 1) % 6 == 0)
{
input.Insert(i, "-");
}
}
}
It simply does not alter the string.
I simply want to pass string...
string test = ("00000000000000000000");
and end up with...
string test = ("00000-00000-00000-00000");
Thank you for any help with this.
Kind Regards,
Stephen
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Because Strings are immutable. That means once created, they cannot be changed.
You have to change this to either pass the string in by reference (you'll be returning a new string anyway) or change this so it returns a string. I prefer the latter...
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Dave Kreskowiak wrote: or change this so it returns a string
Sorry to ask, but how would I do that from within my function?
Steve
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Here's one way of doing it:
private string encodeString(string input)
{
StringBuilder buffer = new StringBuilder();
buffer.AppendFormat("{0}-{1}-{2}-{3}",
input.SubString(0, 5),
input.SubString(5, 5),
input.SubString(10, 5),
input.SubString(15, 5));
return buffer.ToString();
}
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Thank you,
Worked perfect!
Regards,
Stephen
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stephen.darling wrote: It simply does not alter the string.
strings are immutable, nothing you do in .NET will ever alter a string. At best you replace one string by another one, and that is exactly why string methods have a return value.
I suggest you choose an introductory book to C# and start studying it thoroughly, you seem to still be struggling with the basics of the language.
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Luc wrote: nothing you do in .NET will ever alter a string
"you" wasn't referring to you! 
And you really shouldn't.
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"It's what I oughtn't to do, but I do anyway." -- Mel Brooks' History of the World Part 1
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Very appropriately, it goes on: Will you convert? “No, no, no, no.” ref[^]
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You're passing Mel Brooks by reference? 
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of course, there's too much value to pass on.
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private string encodeString(string input)
{
string output = string.Empty;
for (int i = 0; i < input.Length-1; i++)
{
if ((i + 1) % 6 == 0)
{
output = input.Insert(i, "-");
}
}
return output;
}
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Hello.
I tried your code, however, it produces the following result...
"38459171915879268-601"
So, it appears to be adding the whole string and then a '-', instead of a '-' every 5 charictures?
Thank you,
Stephen
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I apologize... I threw that in haste without really thinking it through... this is probably the easiest way to handle any length string...
static string encodeString(string input)
{
string output = string.Empty;
for (int i = 0; i < input.Length; i++)
{
output += input.Substring(i, 1);
if ((i+1) % 6 == 0 && i != (input.Length-1))
output += "-";
}
return output;
}
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fcronin wrote: I apologize... I threw that in haste without really thinking it through... this is probably the easiest way to handle any length string...
No problem!
Thank you again,
Steve
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And you can increment i by six if you like; you're not limited to incrementing by one.
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