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Table doesn't have primary key.....

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560 Jul 6,2002 04:54 AM UTC Jul 16,2002 05:38 AM UTC WinForms 1
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Tags: FAQ
Vipul Bhatt
Asked On July 6, 2002 04:54 AM UTC

When i find a row it says "Table doesn't have primary key", but the primary key is defined in database. Data is ok. Connection is ok(i.e. connecting to proper database). If IsNumeric(txtCatID.Text) Then Dim r As DataRow r = VipCls.dS_Class.Tables ("e_Category").Rows.Find(txtCatID.Text) Cmb_SubCategoryOf.Text = r.Item("Category_Name") End If Subcategory_id is defined as PK.

Administrator [Syncfusion]
Replied On July 16, 2002 05:38 AM UTC

> When i find a row it says > "Table doesn't have primary key", but the primary key is defined in database. This is a reason! PK defined in the DB! But DataGrid knows nothing about real source of data. So u have to define PK in the DataTable manually. This is a short example: // create PK DataSet dataSet = (DataSet)theGrid.DataSource; DataTable table = dataSet.Tables[theGrid.DataMember]; DataColumn[] keys = { table.Columns["ID"] }; table.PrimaryKey = keys; Now u can search. With best regards, Michael.

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