remove row from temporary gridview

Question

I have a gridview which stores temporary data. but I want to remove row by auto generated delete button. SO how to do it, plz suggest me some solutions.

korskor . · Answer

shibasankar, You have the final code for this problem. Please upload the same if you have. Thanks

shibasankar behera · Answer

protected void DeleteInformation(object sender, EventArgs e)     {         object temp = sender;         DataTable dt = GridViewItemlist.DataSource as DataTable;         LinkButton lnkRemove = (LinkButton)sender;         string id = lnkRemove.CommandArgument;         for (int i = dt.Rows.Count - 1; i >= 0; i--)         {             DataRow dr = dt.Rows[i];             if (dr["Item_ID"] == id)                 dr.Delete();         }         GridViewItemlist.DataSource = dt;         GridViewItemlist.DataBind();     }
if (dr["Item_ID"] == id),, this line m getting error, showing
possible unintended reference comparision;to get a value comparision, cast the left hand side to type string

Iftikar Hussain · Answer

this is the solution, you need to tell me what value you are getting for temp and also add EnableViewState="true" at page directive
EnableViewState="true" Inherits="WebApplication1.WebForm1" %>

shibasankar behera · Answer

Still that error is coming.
give me some other solutions.

Iftikar Hussain · Answer

put the break point in below line and check what is returing
protected void DeleteInformation(object sender, EventArgs e) {
object temp=sender;        DataTable dt= GridViewItemlist.DataSource as DataTable;         LinkButton lnkRemove = (LinkButton) sender;         string id=lnkRemove.CommandArgument;         for(int i = dt.Rows.Count-1; i >= 0; i--)         {             DataRow dr = dt.Rows[i];             if (dr["Item_ID"] == id)                 dr.Delete();         }        GridViewItemlist.DataSource = dt; GridViewItemlist.DataBind(); }

shibasankar behera · Answer

Sorry to say, the same error is coming...

Iftikar Hussain · Answer

modify your child gridview for deleting records as like below
CommandArgument=' '  OnClientClick="javascript:return DeleteConfirm(this.href);" OnClick="DeleteInformation" />

shibasankar behera · Answer

Font-Size="11pt" Style="width: 500px; height: 200px;" RowStyle-CssClass="Row"                 AlternatingRowStyle-CssClass="AltRow">                                                                                                                                                                                                                                                                                                                                                                                                                                             CssClass="GVFixedHeader" />                             This is my parent grid view which is coming in a popup.
here is my child grid view below

Iftikar Hussain · Answer

share me your gridview code (aspx)

shibasankar behera · Answer

Actually this is a big program, You plz simply tell how to remove temporary data...
I am getting the data from GridViewItemSrch(gridview) by checkbox and setting to new gridview(GridViewItemlist).

remove row from temporary gridview

15 Replies

Object reference not set to an instance of an object.

Line 220: LinkButton lnkRemove = (LinkButton)sender; Line 221: string id = lnkRemove.CommandArgument; Line 222: for (int i = dt.Rows.Count - 1; i >= 0; i--) Line 223: { Line 224: DataRow dr = dt.Rows[i];

remove row from temporary gridview

Object reference not set to an instance of an object.Line 220: LinkButton lnkRemove = (LinkButton)sender; Line 221: string id = lnkRemove.CommandArgument; Line 222: for (int i = dt.Rows.Count - 1; i >= 0; i--) Line 223: { Line 224: DataRow dr = dt.Rows[i];

Object reference not set to an instance of an object.

Line 220: LinkButton lnkRemove = (LinkButton)sender; Line 221: string id = lnkRemove.CommandArgument; Line 222: for (int i = dt.Rows.Count - 1; i >= 0; i--) Line 223: { Line 224: DataRow dr = dt.Rows[i];