Cross-thread operation not valid: Control ‘dataGridView1’

Question

Hi Mates,

 

I would to get all some data from sharePoint site using win form for UI.

 

InFact i am getting expected output if not using Asynch, await(multi threading) but when i apply multi threading it thows below error.

 

Cross-thread operation not valid: Control 'dataGridView1' accessed from a thread other than the thread it was created on.

 

yes i am using data table to add columns, calling a function to add columns.

 

Actual Code from here :

 

private String lists() // function here for actual logic here to get data.

{

var st = "";

if (Global.sctx != null)

{

Web web = Global.sctx.Web;

Global.sctx.Load(web, w => w.Lists);

Global.sctx.ExecuteQuery();

ListCollection listcoll = web.Lists;

Global.sctx.Load(listcoll);

Global.sctx.ExecuteQuery();

addcolumnsdatatable(); // here calling method for add coulunms.

foreach (List list in listcoll)

{

var dr = dt.NewRow();

st = list.Title;

dr["List Names"] = list.Title;

dt.Rows.Add(dr);

}

dataGridView1.DataSource = dt; // error here with Cross-thread operation not valid

}

return string.Empty;

}

private async void button3_Click(object sender, EventArgs e)

{

Task<string> getliststhread = new Task<string>(lists);

getliststhread.Start();

label10.Text = "Loading lists please wait...";

var getLists = await getliststhread;

label10.Text = "List Exported Grid View Sucessfully...";

}

void addcolumnsdatatable() //adding columns here

{

dt.Columns.Add("List Names", typeof(String));

}

 

kindly help me here with peaice if script where to add, what should i add going forward to avoid errors.

 

thanks In Advance.