How to manipulate string.format with if else in C# ASP.NET?

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i have a string in which i am using String.format in this i want to remove the 2nd parameter if string iteration will come as ="" or NULL and also want to remove the
. AND [Source].[System.IterationPath] IN ('{1}') from the String that will be formed.
is there any way besided the String format ?

What I have tried:

 public void GetProjectInfo(string projectname,string Iteration)
            {
    string querystring = string.Format("select [System.Id], [System.Title],[Story.Author],[Story.Owner],[System.AssignedTo]," +
" [System.WorkItemType],[Microsoft.VSTS.Scheduling.StoryPoints],[Microsoft.VSTS.Common.Priority]," +
"[Microsoft.VSTS.Scheduling.Effort], [Actual.Effort.Completed]" +
",[System.State]," +
 "[System.IterationPath]" +
 " FROM WorkItemLinks" +
 " WHERE" +
" ([Source].[System.TeamProject]='{0}'" +
 " and [Source].[System.WorkitemType] IN ('Feature', 'Bug', 'Product Backlog Item', 'Task')" +
    " AND [Source].[System.IterationPath] IN ('{1}'))"//this line of code will be removed along with iteration parameter 
    +
    " and ([System.Links.LinkType]='System.LinkTypes.Hierarchy-Forward')" +
    " ORDER BY [System.Id] " +
    " mode (Recursive)", projectname, Iteration);

    }

Posted 1-Apr-18 18:21pm

Akhil Jain

Updated 1-Apr-18 22:13pm

v2

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Christiaan van Bergen · Answer 1 · 2018-04-01T22:15:00

You could use a StringBuilder instead of the String.Format. That way you can assert whether or not the value of Iteration is Null or Empty.

C#

public void GetProjectInfo(string projectname,string Iteration)
{
	var querystring = new StringBuilder("select [System.Id], [System.Title],[Story.Author],[Story.Owner],[System.AssignedTo],[System.WorkItemType],[Microsoft.VSTS.Scheduling.StoryPoints],[Microsoft.VSTS.Common.Priority],[Microsoft.VSTS.Scheduling.Effort], [Actual.Effort.Completed],[System.State],[System.IterationPath] FROM WorkItemLinks WHERE ");
	
	querystring.AppendFormat("([Source].[System.TeamProject]='{0}' and [Source].[System.WorkitemType] IN ('Feature', 'Bug', 'Product Backlog Item','Task') ", projectname);

    if (!string.IsNullOrEmpty(Iteration)){
		querystring.AppendFormat("AND [Source].[System.IterationPath] IN ('{1}')) ", Iteration);
	}
	
	querystring.Append(" AND ([System.Links.LinkType]='System.LinkTypes.Hierarchy-Forward') ORDER BY [System.Id] mode (Recursive)");

	//use querystring.ToString() as your SQL statement

}