How to modify function GetSelectStatement to generate inner join select statement by using csharp?

[engsalah2018]

I work on csharp and i need to generate select statement based on inner join select statement but i cannot modify it
I need to get fields and keys and table to generate inner join select statement as below :

select FooterTable.ItemCode,FooterTable.Quantity,FooterTable.UniPrice from

MasterTable inner join FooterTable on MasterTable.Serial=FooterTable.Serial,MasterTable.BranchCode=FooterTable.BranchCode,MasterTable.Year=FooterTable.Year

where MasterTable.Serial=10 AND MasterTable.Year=2019 AND MasterTable.BranchCode=1

What i try to get result above by csharp as following :

public string GetSelectStatement(string JsonDataForSelect)
{
var root = (JObject)JsonConvert.DeserializeObject(JsonDataForSelect);
var query = "";
var items = root.SelectToken("Details").Children().OfType<JProperty>().ToDictionary(p => p.Name, p => p.Value);
foreach (var item in items)
{
if (item.Key == "table")
{
var tableName = item.Value;
query = string.Format("select from table {0} inner join table{1} where", tableName);
}
else if (item.Key == "keys")
{
var key = item.Value.SelectToken("").OfType<JProperty>().ToDictionary(p => p.Name, p => p.Value);
var count = 0;
foreach (var id in key)
{
count++;
if (count == key.Count())
{
query += string.Format("{0} = {1}", id.Key, id.Value);
}
else
{
query += string.Format("{0} = {1} and ", id.Key, id.Value);
}
}

}
}

return query;
}
I need to modify code above to generate select statement as above
to simple syntax i need to make
select FooterTable.fields from MasterTable inner join FooterTable on MasterTable.key1=FooterTable.key1 and MasterTable.key2=FooterTable.key2 and MasterTable.key3=FooterTable.key3 where key1 =value and key2=value and key3=value

How to do that please by modify code above

 

[NoCoolHandle]

im not sure this is the correct answer, but it seems you are trying to generate a sql statement dynamically that joins two tables.
e.g. query = string.Format("select from table {0} inner join table{1} where", tableName);
one part of your issue might be that you seem to be using the where clause for the join columns,

When sql sees the phrase inner join/join it expects an "On" clause.
If you are planning on adding the join columns via the where clause the syntax would be
query = string.Format("select from {0},{1} where", tableName);

also query = string.Format("select from table {0} inner join table{1} where", tableName);
why do you have the word table in there?
plus you only have on tablename in the format statement, but your code is looking for 2 {0} and {1}

shouldn't it be more like
string.Format("select from {0} a inner join {1} b on a.{2} = b.{3} where", table1, table2, col1, col2);

also your original query has table {0} table{1}
table {0} has a space between the word table and the placeholder.

 

[JacquelineReeser]

Seems to me that what NoCoolHandle is suggesting really might work