Asp.net GridView Enabling row selection -

i using gridview in asp.net. want select single data row. looked multiselect , selectionmode in property panel, can't find it.

so how enable selecting rows in gridview?

thanks.

code behind

public partial class searchcourse : system.web.ui.page { connection dbcon; datatable tbl;  protected void page_load(object sender, eventargs e) {     dbcon = new connection();   } protected void radiobutton1_checkedchanged(object sender, eventargs e) {     if (radiobutton1.checked) {         txtsubname.enabled = true;         combosemester.enabled = false;         comboyear.enabled = false;         comboprogram.enabled =false;         txtsubname.text = "";     } } protected void radiobutton2_checkedchanged(object sender, eventargs e) {     if (radiobutton2.checked) {          comboprogram.enabled = true;          if (comboprogram.selecteditem.tostring() == "foundation course")         {             combosemester.enabled = false;             comboyear.enabled = false;         }         else {             combosemester.enabled = true;             comboyear.enabled = true;         }         txtsubname.text = "";         txtsubname.enabled = false;     } }  protected void imgbtnsearch_click(object sender, imageclickeventargs e) {     if (radiobutton1.checked) {         string name = txtsubname.text;         tbl = dbcon.getresultsbysubjectname(name);         gridview1.datasource = tbl;         gridview1.databind();     }     else if (radiobutton2.checked)     {         string program = comboprogram.selecteditem.tostring();         string year = comboyear.selecteditem.tostring();         string sem= combosemester.selecteditem.tostring();         tbl = dbcon.getresultsbyprogram(program,year,sem);         gridview1.datasource = tbl;         gridview1.databind();     }     else if (radiobutton3.checked)         {             string name = txtsubname.text;             tbl = dbcon.getresultsbysubjectno(name);             gridview1.datasource = tbl;             gridview1.databind();         }  }  protected void dropdownlist1_selectedindexchanged(object sender, eventargs e) {     string program = comboprogram.selecteditem.tostring();     string year, sem;     if (program == "foundation course")     {         comboyear.enabled = false;         combosemester.enabled = false;         year = null;         sem = null;     }     else {         comboyear.enabled = true;         combosemester.enabled = true;         year = comboyear.selecteditem.tostring();         sem = combosemester.selecteditem.tostring();     }      tbl = dbcon.getresultsbyprogram(program, year, sem);     gridview1.datasource = tbl;     gridview1.databind(); }  protected void comboyear_selectedindexchanged(object sender, eventargs e) {     string program = comboprogram.selecteditem.tostring();     string year = comboyear.selecteditem.tostring();     string sem = combosemester.selecteditem.tostring();     tbl = dbcon.getresultsbyprogram(program, year, sem);     gridview1.datasource = tbl;     gridview1.databind(); } protected void combosemester_selectedindexchanged(object sender, eventargs e) {     string program = comboprogram.selecteditem.tostring();     string year = comboyear.selecteditem.tostring();     string sem = combosemester.selecteditem.tostring();     tbl = dbcon.getresultsbyprogram(program, year, sem);     gridview1.datasource = tbl;     gridview1.databind();  }    protected void radiobutton3_checkedchanged(object sender, eventargs e) {     if (radiobutton3.checked)     {         txtsubname.enabled = true;         combosemester.enabled = false;         comboyear.enabled = false;         comboprogram.enabled = false;         txtsubname.text = "";     } } protected void gridview1_selectedindexchanged(object sender, eventargs e) {  } 

}

gridview code

<asp:gridview id="gridview1" cssclass="grid" runat="server" allowpaging="true"  bordercolor="black" borderstyle="solid" borderwidth="2px"  gridlines="horizontal"  enableviewstate="false"  pagesize="5"   onselectedindexchanged="gridview1_selectedindexchanged" > 

<rowstyle cssclass="gridrow" width="800px" />  <selectedrowstyle backcolor="#ff0066" forecolor="white" />  </asp:gridview>  

i think multiselect , selectionmode properties available vb.net grid, not in asp.net. bear in mind controls in asp.net html-in-disguise, may more limited. there no reason why can't have multi-select table, have plumbing yourself. need enable row selection, either handling rowdatabound event in

http://forums.asp.net/t/992062.aspx?how+to+select+row+in+gridview+on+click

or else using ms-provided option in

http://msdn.microsoft.com/en-us/library/wbk82279(v=vs.100).aspx

then need handle selectedindexchanging event, figure out row user clicked on, , handle row-colouring yourself.