How to keep the page contents if it is posted back

Question

I need to keep the grid view which appears as a result of searching by id in the text field when the page id posted back. To illustrate I have the link on grid view table takes me to another page then I have on the page link go back that grid view is not found because the page in posted back. please help thank you

Manas Mohapatra · Answer

In below answer it uses Session. Because if you store it cache then it will affect other users. Note: If you want to change to Cache. Find below code snippet: private void view_back() { SqlConnection con = new SqlConnection( ConnectionString ); stringquery= SElEC where t3.user_type='Staff' and t1.IsDeleted = 0 AND t2.MID = ' +TextBox7.Text+ ' ; SqlDataAdapter ad = new SqlDataAdapter( select * from table  con); DataSet ds = new DataSet(); ad.Fill(ds); //Cache.Insert(MId TextBox7.Text null  DateTime.Now.AddMinutes(30) TimeSpan.Zero); Session[ searchText ] = TextBox7.Text; GridView1.DataSource = ds; } protected void Page_Load(objectsender EventArgse) { if (Session[ searchText ] != null ) { TextBox7.Text = Session[ searchText ]; view_back(); rep_bind(); } if (IsPostBack) { label10.Text=  ; view_back(); Session[ searchText ] = TextBox7.Text; grid.Visible= true ; } }

Manas Mohapatra · Answer

Use below code inside IsPostBack like below if(!Page.IsPostBack) { if (Session[ searchText ] != null ) { TextBox7.Text = Session[ searchText ]; view_back(); rep_bind(); } }

Joma Rajab · Answer

Thanks Manas //pageload protected void Page_Load( object senderEventArgse) { Cache[ MId ]=TextBox7.Text; if (TextBox7.Text!= null ) { view_back(); rep_bind(); } if (IsPostBack) { label10.Text=  ; view_back(); Cache[ MId ]=TextBox7.Text; grid.Visible= true ; } } //searchcode protected void Search( object senderEventArgse) { if (TextBox7.Text!= null ) { SqlConnectioncon1= new SqlConnection(ConfigurationManager.ConnectionStrings[ ConnectionString ].ConnectionString); con1.Open(); string query= SElECtt1.*t2.*t3.*fromdbo.MaterialASt1INNERJOINdbo.ModuleRelationAst2ONt2.MID=t1.MIDINNERJOINdbo.UsersASt3ONt3.UniID=t2.UIdwheret3.user_type='Staff'andt1.IsDeleted=0ANDt2.MID=' +TextBox7.Text+ ' ; SqlCommandcom= new SqlCommand(querycon1); SqlDataReaderdr; dr=com.ExecuteReader(); if (dr.HasRows) { dr.Read(); rep_bind(); label10.Text=  ; grid.Visible= true ; } if (!dr.HasRows) { label10.Text= ModuleIDNotFound! ; grid.Visible= false ; } } } //methodfordisplayinggridview private void rep_bind() { if (TextBox7.Text!= null ) { SqlConnectioncon1= new SqlConnection(ConfigurationManager.ConnectionStrings[ ConnectionString ].ConnectionString); con1.Open(); string query= SElECtt1.*t2.*t3.*fromdbo.MaterialASt1INNERJOINdbo.ModuleRelationAst2ONt2.MID=t1.MIDINNERJOINdbo.UsersASt3ONt3.UniID=t2.UIdwheret3.user_type='Staff'andt1.IsDeleted=0ANDt2.MID=' +TextBox7.Text+ ' ; SqlDataAdapterda= new SqlDataAdapter(querycon1); DataSetds= new DataSet(); da.Fill(ds); GridView1.DataSource=ds; GridView1.DataBind(); } } //forclickonviewlinkongridviewtoredirecttoaontherpage public void View() { Response.Redirect( View.aspx?Id= +(MaID)); } //thisIdidtokeepthecontentsofthepagewhenitloadedandIcalledinloadmethodbutnotworkingjustitkeepserrormessageforif(!dr.HasRows) private void view_back() { if (TextBox7.Text!= null ) { SqlConnectioncon1= new SqlConnection(ConfigurationManager.ConnectionStrings[ ConnectionString ].ConnectionString); con1.Open(); string query= SElECtt1.*t2.*t3.*fromdbo.MaterialASt1INNERJOINdbo.ModuleRelationAst2ONt2.MID=t1.MIDINNERJOINdbo.UsersASt3ONt3.UniID=t2.UIdwheret3.user_type='Staff'andt1.IsDeleted=0ANDt2.MID=' +TextBox7.Text+ ' ; SqlCommandcom= new SqlCommand(querycon1); SqlDataReaderdr; dr=com.ExecuteReader(); if (dr.HasRows) { dr.Read(); rep_bind(); label10.Text=  ; grid.Visible= true ; } if (!dr.HasRows) { label10.Text= ModuleIDNotFound! ; //thisappearswhenthepageispostedback grid.Visible= false ; } } } me with an example of using cache I tried to keep the id in search text field in loading page but it still not working can you please provide please help I am really struggling with it Thanks

Joma Rajab · Answer

Thanks I am sorry for keeping post to you I added the code to post back page but it returns the case to the beginning which means when I go back to the page the grid view is not found and text field is empty

Joma Rajab · Answer

Thanks very much Itworks but I cannot search with another id as the previous result on grid view stay there please if you have any idea to fix it thanks

Manas Mohapatra · Answer

If you are playing with more than one page either you have to keep it Cache or server session variable. If you play in one page then you can use viewstate concept to store results. But your cas is different. So for your case first option is suitable.