How I enable textbox nested inside gridview in rowediting ?

Anurag Sharma

8y2.2k.NET

How can i enable textbox nested inside Gridview in RowEditing event ?

protected void MyGrid_RowEditing(object sender, GridViewEditEventArgs e)
{
string CampID;
//int id = Convert.ToInt32(MyGrid.DataKeys[e.].ToString());
CampID = (Session["CampaignID"].ToString());
mf.UpdateStatus(CampID, 'X');
MyGrid.EditIndex = e.NewEditIndex;
//string lblOfferType = MyGrid.Rows[e.NewEditIndex].Cells[4].Text;
GridViewRow currentRow = this.MyGrid.Rows[e.NewEditIndex];

string lblOfferType = (currentRow.FindControl("lblOffer_Type") as Label).Text;
//string freeQty = (currentRow.FindControl("txtFree_Qty") as TextBox).Text;
//string discPercent = (currentRow.FindControl("txtDisc_Percent") as TextBox).Text;
//TextBox discValue = (currentRow.FindControl("txtDisc_Value") as TextBox);
//string offerPrice = (currentRow.FindControl("txtOffer_Price") as TextBox).Text;
//string freeArticle = (currentRow.FindControl("txtFree_Article") as TextBox).Text;

if (lblOfferType == "VALUE DISCOUNT")
{
GridViewRow row = (GridViewRow)((Control)sender).NamingContainer;
GridViewRow currentRow1 = this.MyGrid.Rows[e.NewEditIndex];
((TextBox)MyGrid.Rows[e.NewEditIndex].FindControl("txtDisc_Value")).Enabled = false;
//discValue.Enabled = true;
//(currentRow.FindControl("txtDisc_Value") as TextBox).Enabled = true;
//((TextBox)currentRow.FindControl("txtDisc_Value")).Enabled = true;
}
}

Error: Object reference not set to an instance.

7 Replies

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Anurag Sharma8y ago

I am able to find the value of lblDisc_Value but unable to Enable txtDisc_Value to false or true
Anurag Sharma8y ago
Please provide better solution to the problem.
Thanks in Advance.
Joginder Banger8y ago
this is the way of get control RowUpdating event, I beleive this code really help you rowEditing event.

protected void gvEquipment_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow ParentGridRow = gvEquipment.Rows[0];
GridView GridViewChild = (GridView)ParentGridRow.FindControl("GridViewChild");

GridViewRow ChildRow = childGridView.Rows[GridViewChild.EditIndex];

TextBox txtBoxExample = (TextBox)ChildRow.FindControl("ControlToFind");
}

RowEditing :

protected void gridstate_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView g = (GridView)gridcountry.Rows[indexedit].FindControl("gridstate");
for (int j = 0; j <= g.Rows.Count - 1; j++)
{ string Cid = gridcountry.DataKeys[e.NewEditIndex].Value.ToString();
DataSet ds = cm.select("Select * from state where countryid=" + Cid + "");
Panel Panel = (Panel)g.Rows[j].FindControl("Panel1");
Label lbl = (Label)g.Rows[j].FindControl("Label1");
TextBox txt = (TextBox)g.Rows[j].FindControl("TextBox1");
lbl.Visible = false;
txt.Text = ds.Tables[0].Rows[j]["statename"].ToString();
Panel.Visible = true;
Panel.Controls.Add(txt);
txt.Visible = true;
}
}

for more information please check link mention below.

https://www.codeproject.com/Tips/732964/Nested-gridview-Edit
Anurag Sharma8y ago
I have tried this as suggested by codeproject:

TextBox txtDisc_Value =(TextBox)MyGrid.Rows[e.NewEditIndex].FindControl("txtDisc_Value");
txtDisc_Value.Enabled = false;

but this error is showing after executing your line of code:-

"Object reference not set to an instance of an object."
Anurag Sharma8y ago
I have done the same thing to find control as

MyGrid.EditIndex = e.NewEditIndex;
//string lblOfferType = MyGrid.Rows[e.NewEditIndex].Cells[4].Text;
GridViewRow currentRow = this.MyGrid.Rows[e.NewEditIndex];
string lblOfferType = (currentRow.FindControl("lblOffer_Type") as Label).Text;

lblOfferType has value also lblOfferType == "VALUE DISCOUNT"

but i want this

if (lblOfferType == "VALUE DISCOUNT")
{
//Enabling to be true for the particular Textbox in same row of grid
((TextBox)MyGrid.Rows[e.NewEditIndex].FindControl("txtDisc_Value")).Enabled = true;
}

As i am getting error as object reference not set to an instance
Anurag Sharma8y ago
How could you enable particular textbox in gridview based on some text value in the same row of grid.....

if (lblOfferType == "VALUE DISCOUNT")
{
GridViewRow row = (GridViewRow)((Control)sender).NamingContainer;
GridViewRow currentRow1 = this.MyGrid.Rows[e.NewEditIndex];
((TextBox)MyGrid.Rows[e.NewEditIndex].FindControl("txtDisc_Value")).Enabled = false;
}
Joginder Banger8y ago
what you think about below snippet code:

protected void grv_RowEditing(object sender, GridViewEditEventArgs e)
{
grv.EditIndex = e.NewEditIndex;
grv.DataBind();
//Find Controls Here like below:
Textbox txt= grv.Rows[e.NewEditIndex].FindControl("YourTextBoxID") as TextBox;
DropDownList ddl_branch = (DropDownList)grv.Rows[e.NewEditIndex].FindControl("ddl_branch");
Label lb_ = (Label)grv.Rows[e.NewEditIndex].FindControl("YourLabelID");
}