How can i read txt file and set value in textbox through c#

Feroz Khan

Please see below code and picture i want to read data from .txt every after pipe value i want to fix value in text box how can i do this.. with search text box.

using (StreamReader sr = new StreamReader(@"C:\filename.txt", true))

{

while ((line = sr.ReadLine()) != null)

{

if(line.Contains(barcode_or_item_txt.Text))

{

Price_txt.Text = line.Substring(8,5);

}

11 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vipul Malhotra10y ago
Hi,
I have tried implementing your requirement. Please review the code below:
publicstaticvoidReadFile()
{
stringfilePath=@"C:\Users\Vipul\Downloads\SomeFile.txt";
string[]allLines=File.ReadAllLines(filePath);
string[]CurrentRow;
stringcurrentRowName=string.Empty;
if(allLines.Length>0)
{
foreach(stringsRowinallLines)
{
CurrentRow=sRow.Split('|');
if(CurrentRow[1]=="12345654564")
{
currentRowName=CurrentRow[2];
vipul.WriteLine(currentRowName);
}
}
}
}
Hope it helped.
Thanks
Vipul
Vinay Singh10y ago
Hi Check the Code.
stringsearch=txtSearchValue.Text;
stringfilepath=@"C:\TextFile1.txt";
varfileStream=newFileStream(filepath,FileMode.Open,FileAccess.Read);
using(varstreamReader=newStreamReader(fileStream,Encoding.UTF8))
{
stringline;
while((line=streamReader.ReadLine())!=null)
{
string[]splitLine=line.Split('|');
if(splitLine.Contains(search))
{
txtName.Text=splitLine[2];
}
}
}
In above code just check the line no 9 and 10. After reading the text file i have split the file line value by |. and after that i have got the array of the string. and In line 10 i have check the array contain the passed string or not.
Just place the code on button click. or the event in which you want to get the detail.
theLizard10y ago
@Karthik
Looking at the sql statements you have in your example, you are open to sql injection attacks,
http://www.w3schools.com/sql/sql_injection.asp
theLizard10y ago
RichTextBox r = new RichTextBox();
r.LoadFile(@"c:\temp\t.txt", RichTextBoxStreamType.PlainText);
string s = "525264565";
int pos = r.Find(s);
pos += s.Length + 1;
s = r.Text.Substring(pos, r.Text.Length - pos);
s = s.Substring(0, s.IndexOf("|"));

textBox1.Text = s;

textBox1 now contains --- Asad Ali

This is one way.
Karthik Elumalai10y ago
Hi Feroz Khan
Hope the below my blog will surely help you.

http://www.c-sharpcorner.com/blogs/simple-asp-net-code-to-find-all-the-sql-statements-used-in-a-project

In the above link, I have read text file and got the sql query ,according the keyword am provided,so Hope with the small modification with code above,you can get what you want.
Kindly let me know your feedback or suggestion
Thanks
Nitin Sontakke10y ago
Okay, now that clarifies.
It seems you are giving too much importance to the .text file. The answer largely depends on size of the text file. If it is just few MBs, then it probably makes sense to just load the whole file in a DataTable and then search the data table itself.
Searching in a text file every time the user clicks on a 'Search' button is not a good idea.
Just load the whole text file in a data table (in memory).
Hope it helps!
Feroz Khan10y ago
Dear All thanks for your reply what i need exact i will explain your please see below
below value is available in my .txt file ok Now i want to read where Name like Feroz Khan and Asad Ali that i want to show in Textbox how can i do that..
for Example i have two text box one for search and one for show and one button.
if i put the value in search text box like = 12345654564
then show me Name Like Feroz Khan in show text box . that's it.
.TXT File
12345|12345654564|Feroz Khan|200
12345|525264565|Asad Ali|100
Vinay Singh10y ago
Hi what do you mean by fixed value
Nitin Sontakke10y ago
Apologies for jumping in. However, unfortunately, still it is not quite clear what is it that you want to achieve.
In any case, if it helps, you can split the line read from text file and get an array and work with it. For example,
String[] values = line.Split(new Char[] {'|'});
You can then access values like values[0], etc.
Hope it helps!
Feroz Khan10y ago
yes Asad,
I want to read containt from my .txt file and .txt file i have already attached please see the picture every some text there pipe like (|) this line every pipe i want to fix value in textbox thorugh search..
Asad Ali10y ago
Please be more clear in you requirenment.
So you want to read the content of your file and then assign that content to a textbox?
/Asad