How to string Replace in asp.net C#

Nirmal KumarC

Table Designing:

TempId TempName Message

1 Fees Dear * your * is pending amount

Front end selected value in "*" D

How to this text in "*" only get it different value replace the data.

I want This result :

Dear John your 25000 is started pending amount

7 Replies

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Vulpes12y ago
Accepted answer
Even if you use the same character for all the placeholders, it's still possible to do it using regular expressions:

using System.Text.RegularExpressions;

// ...

string message = "Dear * your * is pending amount";
string[] replacements = {"John", "25000"};
MatchCollection mc = Regex.Matches(message, @"\*");
int limit = Math.Min(mc.Count, replacements.Length) - 1;

for(int i = limit; i >= 0; i--)
{
message = message.Remove(mc[i].Index, 1).Insert(mc[i].Index, replacements[i]);
}

Response.Write(message);

The output, as expected, is:

Dear John your 25000 is pending amount
Nirmal KumarC12y ago
Dear sir,

Your information very helpful sir.

Thank you sir.
Nirmal KumarC12y ago
Dear sir,

Your information very helpful sir.

Thank you sir.
Jignesh Trivedi12y ago
Hi,
We can also use string.format function but for that we have to change in in input string...
string message = "Dear {0} your {1} is pending amount";
string[] replacements = {"John", "25000"};
string newstring = String.Format(message,replacements);
hope this will help you.
Vulpes12y ago
Thanks Nitesh.

You could still do it using:

message.IndexOf('*', startIndex)

to get successive positions of the asterisks but regular expressions are neater :)
Nitesh Kejriwal12y ago
Pretty Good Vulpes Sir!!!!
Nitesh Kejriwal12y ago
Please explain further, from where is the word John and amount 25000 is coming. Also, is there any possibility of having 2 different characters instead of same * character?