ho to convert empty string into null value and store in oracle db

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C#

DropDownList ddlist = (DropDownList)dr.Cells[(int)profoptgridcol.value].FindControl("ddlValue");
                                    if (ddlist.Visible && ddlist != null)
                                       userprofoptdt.Rows[actualrowidx][(int)profoptgridsrccol.selvalue] = Convert.ToString(ddlist.SelectedValue);

so my req is,if i select blank in dropdown list(ddlist),it should accept balnk and store as null in db.

current functionality: if i select blank in ddlist and save its showing previous val in ddlist and in db.

here:

C#

ddlvalue=dropdownlist ctrl

profoptgridcol is a enum:

C#

enum profoptgridcol : int
        {
            optiondesc = 0, defvaluedescr, curvaldescr, value, useroptionval, optname, valuelist, optionid
        }

Posted 17-Feb-15 18:47pm

Member 10714689

Updated 17-Feb-15 18:53pm

Wendelius

v3

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Wendelius · Answer 1 · 2015-02-17T18:57:00

Based on the description it sounds that you're storing the value from some other variable, datatable etc and that it's not properly synced with the selection of the drop down list.

Without seeing all the relevant code, the best advice is to use the debugger to go through the code and see where the mismatch is.

When saving to the database make sure that you use DBNull.Value for blank selection and store that value into the table via a OracleParameter.

Abhinav S · Answer 2 · 2015-02-17T19:01:00

Solution 2

In your command parameters, try cmd.Parameters.Add("column", "Null");

Posted 17-Feb-15 19:01pm

Abhinav S