GridView sorting by clicking column header in C#

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Hi,
My code looks like below. How to sort the gridview by clicking any of the column header? Let say sort it after done the search from gridview.
I already set the allow sorting = true and how should i code in below>

C#

SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandType = CommandType.Text;
        cmd.CommandText = "select top 1000 machineNameDisplay, equipment_type, frequency, formStatus, NextDueDate, cal_eqid from dbo.Obs_PMChkList_1 where v_dept = 'BGA EOL'";

        //DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        DataView dv = new DataView();

        SqlDataAdapter adp = new SqlDataAdapter(cmd);
        adp.Fill(dt);
        GridView1.DataSource = dt;
        dv = dt.DefaultView;
        //Session["values"] = dv;
        //BindData("");
        GridView1.DataBind();
        conn.Close();

C#

protected void btnSearch_Click(object sender, EventArgs e)
    {
        string searchString = txtSearch.Text;

        foreach (GridViewRow row in GridView1.Rows)
        {
            TableCellCollection cells = row.Cells;

            foreach (TableCell cell in cells)
            {
                //if (cell.Text.ToLower().StartsWith(searchString.ToLower()))
                if (cell.Text.ToLower().StartsWith(searchString.ToLower()))
                {
                    break;

                }
                else
                {
                    //does not meet
                    cell.Visible = false;
                }
            }
        }
    }

C#

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
//How to code here?
}

Posted 25-Nov-12 22:16pm

BabyOreo

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4 solutions

Solution 2

Hi,

Refer the below link.

Gridview Sorting with Up and Down Icons, Paging[^]

Optimized Paging and Sorting using Object Data Source[^]

GridView:Sorting & Paging Using Generics And Nullable Datatype Function Of C# GetValueOrDefault()[^]

Posted 25-Nov-12 22:26pm

Mohd. Mukhtar

Updated 25-Nov-12 22:27pm

v2

Solution 1

nothing at all, It should working

Posted 25-Nov-12 22:23pm

kareem salem

Solution 4

Hi,

1. My search function seems does not working as expected. My expected result is display the whole row but it does not. For eg, i search for "abc" and the 2nd column of the row contains "abc", system only display from second column onwards. I need it to display in whole row (include 1st cell).

2. After this, i need to sort it if click on the header. It have to able to sort it from my search result.

Please help!

Posted 26-Nov-12 16:55pm

BabyOreo

Comments

BabyOreo 5-Dec-12 2:08am

Following code solve my 2nd issue:

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
DataTable dt = ((DataSet)Session["myDataSet"]).Tables[0];
dt.DefaultView.Sort = e.SortExpression + " " + GetSortDirection(e.SortExpression);
GridView1.DataSource = dt;
GridView1.DataBind();
}

private string GetSortDirection(string column)
{
string sortDirection = "DESC";
string sortExpression = ViewState["SortExpression"] as string;

if (sortExpression != null)
{
if (sortExpression == column)
{
string lastDirection = ViewState["SortDirection"] as string;
if ((lastDirection != null) && (lastDirection == "DESC"))
{
sortDirection = "ASC";
}
}
}

ViewState["SortDirection"] = sortDirection;
ViewState["SortExpression"] = column;

return sortDirection;
}

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BabyOreo · Accepted Answer · 2012-11-26T18:48:00

I solved issue 1 with flag:
Appreciate who can help my second issue with provide some sample.
Thanks!

C#

protected void btnSearch_Click(object sender, EventArgs e)
    {
        int flag;
        string searchString = txtSearch.Text;

        foreach (GridViewRow row in GridView1.Rows)
        {
            flag = 0;
            TableCellCollection cells = row.Cells;

            foreach (TableCell cell in cells)
            {
                //if (cell.Text.ToLower().StartsWith(searchString.ToLower()))
                if (cell.Text.ToLower().StartsWith(searchString.ToLower()))
                {

                    flag = 1;                    
                    break;

                }
                            }
             if (flag == 0 )
             {
                 row.Visible = false;

             }
        }