关于ildasm反编ado.net语句后，增加相关代码的问题

通过ildasm反编出如下代码：
.method private hidebysig instance void
tv_AfterSelect(object sender,
class [System.Windows.Forms]System.Windows.Forms.TreeViewEventArgs e) cil managed
{
// 代码大小 318 (0x13e)
.maxstack 4
.locals init (class [System.Windows.Forms]System.Windows.Forms.TreeNode V_0,
string V_1,
string V_2,
class [System.Data]System.Data.SqlClient.SqlConnection V_3,
class [System.Data]System.Data.SqlClient.SqlDataAdapter V_4,
class [System.Data]System.Data.DataSet V_5,
string[] V_6)
IL_0000: newobj instance void [System.Windows.Forms]System.Windows.Forms.TreeNode::.ctor()
IL_0005: stloc.0
IL_0006: ldstr "Select * FROM MainTable"
IL_000b: stloc.1
IL_000c: ldarg.0
IL_000d: ldfld class [System.Windows.Forms]System.Windows.Forms.TreeView ApcWord.Form1::tv
IL_0012: callvirt instance class [System.Windows.Forms]System.Windows.Forms.TreeNode [System.Windows.Forms]System.Windows.Forms.TreeView::get_SelectedNode()
IL_0017: stloc.0
IL_0018: ldloc.0
IL_0019: callvirt instance string [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Text()
IL_001e: stloc.2
IL_001f: ldarg.0
IL_0020: ldloc.0
IL_0021: callvirt instance string [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Text()
IL_0026: callvirt instance void [System.Windows.Forms]System.Windows.Forms.Control::set_Text(string)
IL_002b: ldloc.2
IL_002c: ldstr bytearray (E5 5D 0B 7A BE 8B A1 8B ) // .].z....
IL_0031: call bool [mscorlib]System.String::op_Inequality(string,
string)
IL_0036: brfalse IL_013d

IL_003b: ldloc.0
IL_003c: callvirt instance class [System.Windows.Forms]System.Windows.Forms.TreeNode [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Parent()
IL_0041: brfalse.s IL_0089

IL_0043: ldc.i4.5
IL_0044: newarr [mscorlib]System.String
IL_0049: stloc.s V_6
IL_004b: ldloc.s V_6
IL_004d: ldc.i4.0
IL_004e: ldstr bytearray (53 00 65 00 6C 00 65 00 63 00 74 00 20 00 49 00 // S.e.l.e.c.t. .I.
44 00 2C 00 20 00 07 68 98 98 2C 00 20 00 07 68 // D.,. ..h..,. ..h
B5 6B 2C 00 20 00 7F 62 FA 5E 2C 00 D1 76 06 74 // .k,. ..b.^,..v.t
20 00 66 00 72 00 6F 00 6D 00 20 00 4D 00 61 00 // .f.r.o.m. .M.a.
69 00 6E 00 54 00 61 00 62 00 6C 00 65 00 20 00 // i.n.T.a.b.l.e. .
57 00 68 00 65 00 72 00 65 00 20 00 50 5B 7B 7C // W.h.e.r.e. .P[{|
20 00 6C 00 69 00 6B 00 65 00 20 00 27 00 25 00 ) // .l.i.k.e. .'.%.
IL_0053: stelem.ref
IL_0054: ldloc.s V_6
IL_0056: ldc.i4.1
IL_0057: ldloc.0
IL_0058: callvirt instance string [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Text()
IL_005d: stelem.ref
IL_005e: ldloc.s V_6
IL_0060: ldc.i4.2
IL_0061: ldstr bytearray (25 00 27 00 20 00 41 00 6E 00 64 00 20 00 36 72 // %.'. .A.n.d. .6r
7B 7C 20 00 6C 00 69 00 6B 00 65 00 20 00 27 00 // {| .l.i.k.e. .'.
25 00 ) // %.
IL_0066: stelem.ref
IL_0067: ldloc.s V_6
IL_0069: ldc.i4.3
IL_006a: ldloc.0
IL_006b: callvirt instance class [System.Windows.Forms]System.Windows.Forms.TreeNode [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Parent()
IL_0070: callvirt instance string [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Text()
IL_0075: stelem.ref
IL_0076: ldloc.s V_6
IL_0078: ldc.i4.4
IL_0079: ldstr "%'"
IL_007e: stelem.ref
IL_007f: ldloc.s V_6
IL_0081: call string [mscorlib]System.String::Concat(string[])
IL_0086: stloc.1
IL_0087: br.s IL_009f

IL_0089: ldstr bytearray (53 00 65 00 6C 00 65 00 63 00 74 00 20 00 49 00 // S.e.l.e.c.t. .I.
44 00 2C 00 20 00 07 68 98 98 2C 00 20 00 07 68 // D.,. ..h..,. ..h
B5 6B 2C 00 20 00 7F 62 FA 5E 2C 00 D1 76 06 74 // .k,. ..b.^,..v.t
20 00 66 00 72 00 6F 00 6D 00 20 00 4D 00 61 00 // .f.r.o.m. .M.a.
69 00 6E 00 54 00 61 00 62 00 6C 00 65 00 20 00 // i.n.T.a.b.l.e. .
57 00 68 00 65 00 72 00 65 00 20 00 50 5B 7B 7C // W.h.e.r.e. .P[{|
20 00 6C 00 69 00 6B 00 65 00 20 00 27 00 25 00 ) // .l.i.k.e. .'.%.
IL_008e: ldloc.0
IL_008f: callvirt instance string [System.Windows.Forms]System.Windows.Forms.TreeNode::get_Text()
IL_0094: ldstr "%'"
IL_0099: call string [mscorlib]System.String::Concat(string,
string,
string)
IL_009e: stloc.1
IL_009f: ldc.i4.8
IL_00a0: newarr [mscorlib]System.String
IL_00a5: stloc.s V_6
IL_00a7: ldloc.s V_6
IL_00a9: ldc.i4.0
IL_00aa: ldstr "server="
IL_00af: stelem.ref
IL_00b0: ldloc.s V_6
IL_00b2: ldc.i4.1
IL_00b3: ldarg.0
IL_00b4: ldfld string ApcWord.Form1::server
IL_00b9: stelem.ref
IL_00ba: ldloc.s V_6
IL_00bc: ldc.i4.2
IL_00bd: ldstr ";uid="
IL_00c2: stelem.ref
IL_00c3: ldloc.s V_6
IL_00c5: ldc.i4.3
IL_00c6: ldarg.0
IL_00c7: ldfld string ApcWord.Form1::uid
IL_00cc: stelem.ref
IL_00cd: ldloc.s V_6
IL_00cf: ldc.i4.4
IL_00d0: ldstr ";pwd="
IL_00d5: stelem.ref
IL_00d6: ldloc.s V_6
IL_00d8: ldc.i4.5
IL_00d9: ldarg.0
IL_00da: ldfld string ApcWord.Form1::pwd
IL_00df: stelem.ref
IL_00e0: ldloc.s V_6
IL_00e2: ldc.i4.6
IL_00e3: ldstr ";database="
IL_00e8: stelem.ref
IL_00e9: ldloc.s V_6
IL_00eb: ldc.i4.7
IL_00ec: ldarg.0
IL_00ed: ldfld string ApcWord.Form1::database
IL_00f2: stelem.ref
IL_00f3: ldloc.s V_6
IL_00f5: call string [mscorlib]System.String::Concat(string[])
IL_00fa: newobj instance void [System.Data]System.Data.SqlClient.SqlConnection::.ctor(string)
IL_00ff: stloc.3
IL_0100: newobj instance void [System.Data]System.Data.SqlClient.SqlDataAdapter::.ctor()
IL_0105: stloc.s V_4
IL_0107: ldloc.s V_4
IL_0109: ldloc.1
IL_010a: ldloc.3
IL_010b: newobj instance void [System.Data]System.Data.SqlClient.SqlCommand::.ctor(string,
class [System.Data]System.Data.SqlClient.SqlConnection)
IL_0110: callvirt instance void [System.Data]System.Data.SqlClient.SqlDataAdapter::set_SelectCommand(class [System.Data]System.Data.SqlClient.SqlCommand)
IL_0115: newobj instance void [System.Data]System.Data.DataSet::.ctor()
IL_011a: stloc.s V_5
IL_011c: ldloc.s V_4
IL_011e: ldloc.s V_5
IL_0120: ldstr "MainTable"
IL_0125: callvirt instance int32 [System.Data]System.Data.Common.DbDataAdapter::Fill(class [System.Data]System.Data.DataSet,
string)
IL_012a: pop
IL_012b: ldarg.0
IL_012c: ldfld class [System.Windows.Forms]System.Windows.Forms.DataGrid ApcWord.Form1::dt
IL_0131: ldloc.s V_5
IL_0133: ldstr "MainTable"
IL_0138: callvirt instance void [System.Windows.Forms]System.Windows.Forms.DataGrid::SetDataBinding(object,
string)
IL_013d: ret
} // end of method Form1::tv_AfterSelect

我想在ado.net中再加入commnadtimeout=0这样的值该怎样做？