You can get Intersect of two LINQ query or Results.
Intersect means find common records between two LINQ results.
You can also say find duplicate records from two LINQ query or Results.
In this example we find duplicate records from two DataTable using LINQ.
Here is example of this.
In this example we execute two different LINQ Query on DataTable and find two different results object.
After that we find common records from these two results.
C# Examples :
VB.net Examples :
Output :
This type of C# Tips is very useful in day to day programming life.
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Intersect means find common records between two LINQ results.
You can also say find duplicate records from two LINQ query or Results.
In this example we find duplicate records from two DataTable using LINQ.
Here is example of this.
In this example we execute two different LINQ Query on DataTable and find two different results object.
After that we find common records from these two results.
C# Examples :
DataSet ds = new DataSet(); DataTable dt = new DataTable(); DataColumn dc; DataRow dr; ds.DataSetName = "products"; dt.TableName = "product"; dc = new DataColumn("product_id",long.MaxValue.GetType()); dt.Columns.Add(dc); dc = new DataColumn("product_name"); dt.Columns.Add(dc); dr = dt.NewRow(); dr["product_id"] = 1; dr["product_name"] = "Monitor"; dt.Rows.Add(dr); dr = dt.NewRow(); dr["product_id"] = 2; dr["product_name"] = "Mouse"; dt.Rows.Add(dr); dr = dt.NewRow(); dr["product_id"] = 3; dr["product_name"] = "KeyBoard"; dt.Rows.Add(dr); dr = dt.NewRow(); dr["product_id"] = 4; dr["product_name"] = "LCD"; dt.Rows.Add(dr); ds.Tables.Add(dt); IEnumerable<DataRow> objResult1 = from tbl in dt.AsEnumerable() where tbl.Field<long>(0) >=3 select tbl; Response.Write("<b>Query Results 1</b>"); foreach (DataRow row in objResult1) { Response.Write(string.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field<long>(0), row.Field<string>(1))); } IEnumerable<DataRow> objResult2 = from tbl in ds.Tables[0].AsEnumerable() let product_name = tbl.Field<string>(1) where product_name.StartsWith("Key") || product_name.StartsWith("Mo") select tbl; Response.Write("<br/><br/><b>Query Results 2</b>"); foreach (DataRow row in objResult2) { Response.Write(string.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field<long>(0), row.Field<string>(1))); } IEnumerable<DataRow> objIntersectResult = objResult1.Intersect(objResult2); Response.Write("<br/><br/><b>Intersect Query Results</b>"); foreach (DataRow row in objIntersectResult) { Response.Write(string.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field<long>(0), row.Field<string>(1))); } Response.Write("<br/><br/>");
VB.net Examples :
Dim ds As New DataSet() Dim dt As New DataTable() Dim dc As DataColumn Dim dr As DataRow ds.DataSetName = "products" dt.TableName = "product" dc = New DataColumn("product_id", Long.MaxValue.GetType()) dt.Columns.Add(dc) dc = New DataColumn("product_name") dt.Columns.Add(dc) dr = dt.NewRow() dr("product_id") = 1 dr("product_name") = "Monitor" dt.Rows.Add(dr) dr = dt.NewRow() dr("product_id") = 2 dr("product_name") = "Mouse" dt.Rows.Add(dr) dr = dt.NewRow() dr("product_id") = 3 dr("product_name") = "KeyBoard" dt.Rows.Add(dr) dr = dt.NewRow() dr("product_id") = 4 dr("product_name") = "LCD" dt.Rows.Add(dr) ds.Tables.Add(dt) Dim objResult1 As IEnumerable(Of DataRow) = From tbl In dt.AsEnumerable() Where tbl.Field(Of Long)(0) >= 3 Select tbl Response.Write("<b>Query Results 1</b>") For Each row As DataRow In objResult1 Response.Write(String.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field(Of Long)(0), row.Field(Of String)(1))) Next Dim objResult2 As IEnumerable(Of DataRow) = From tbl In ds.Tables(0).AsEnumerable() Let product_name = tbl.Field(Of String)(1) Where product_name.StartsWith("Key") Or product_name.StartsWith("Mo") Select tbl Response.Write("<br/><br/><b>Query Results 2</b>") For Each row As DataRow In objResult2 Response.Write(String.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field(Of Long)(0), row.Field(Of String)(1))) Next Dim objIntersectResult As IEnumerable(Of DataRow) = objResult1.Intersect(objResult2) Response.Write("<br/><br/><b>Intersect Query Results</b>") For Each row As DataRow In objIntersectResult Response.Write(String.Format("<br/>Product ID: {0} , Product Name: {1}", row.Field(Of Long)(0), row.Field(Of String)(1))) Next Response.Write("<br/><br/>")
Output :
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