How Can I Pass Dynamic Array To Sql Query In C#

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For Example I have an array,

C#

string[] ClassEightstudents= ctx_School.Students.Where(x => x.StudentClass== "8").Select(x => x.StudentName).ToArray();

Now I want to pass this in query C#,

C#

cmd.CommandText=select * from CricketTable where studentname in '"+ClassEightstudents+"'

Posted 12-Oct-15 20:49pm

shaprpuff

Updated 12-Oct-15 20:59pm

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Palash Mondal_ · Accepted Answer · 2015-10-12T20:58:00

Refer: Parameterize an SQL IN clause[^]

You can parameterize each value, so something like:

C#

string[] tags = new string[] { "ruby", "rails", "scruffy", "rubyonrails" };
string cmdText = "select * from CricketTable where studentname IN ({0})";

string[] paramNames = tags.Select(
    (s, i) => "@tag" + i.ToString()
).ToArray();

string inClause = string.Join(",", paramNames);
using (SqlCommand cmd = new SqlCommand(string.Format(cmdText, inClause))) {
    for(int i = 0; i < paramNames.Length; i++) {
       cmd.Parameters.AddWithValue(paramNames[i], tags[i]);
    }
}

Which will give you:

C#

cmd.CommandText = "select * from CricketTable where studentname IN (@tag0,@tag1,@tag2,@tag3)"
cmd.Parameters["@tag0"] = "ruby"
cmd.Parameters["@tag1"] = "rails"
cmd.Parameters["@tag2"] = "scruffy"
cmd.Parameters["@tag3"] = "rubyonrails"

PANKAJMAURYA · Accepted Answer · 2015-10-12T21:31:00

Solution 2

You can use

C#

string[] ClassEightstudents= ctx_School.Students.Where(x => x.StudentClass== "8").Select(x => x.StudentName).ToArray();

          string str = "select * from CricketTable where studentname in ('" + String.Join("','", ClassEightstudents) + "')";

Posted 12-Oct-15 21:31pm

PANKAJMAURYA

Comments

Krunal Rohit 13-Oct-15 3:39am

looks good. 5!

-KR

[no name] 13-Oct-15 3:47am

Thanks Krunal ..

shaprpuff 13-Oct-15 4:25am

I like your solution is much better.

[no name] 13-Oct-15 4:54am

Thanks Shaprpuff.

shaprpuff · Accepted Answer · 2015-10-12T22:22:00

i did this solution and its work for me.

C#

string[] ClassEightstudents= ctx_School.Students.Where(x => x.StudentClass== "8").Select(x => x.StudentName).ToArray();

foreach (var item in ClassEightstudents)
  {
      ClassEightstudentsformat =ClassEightstudentsformat+ "'" + item + "'" + ",";
  }
   ClassEightstudentsformat =ClassEightstudentsformat .TrimEnd(',');

then pass it into command

C#

cmd.CommandText=select * from CricketTable where studentname in '"+ClassEightstudentsformat +"'

How Can I Pass Dynamic Array To Sql Query In C#

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